408 lines
9.7 KiB
Python
408 lines
9.7 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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from itertools import zip_longest, chain
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class Stack(object):
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"""Docstring for Stack """
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def __init__(self):
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self.items = []
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def pushFromList(self, list):
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"""Push the list in the stack
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:param list: a list
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"""
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for i in list[::-1]:
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self.push(i)
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def isEmpty(self):
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""" Says if the stack is empty
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"""
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return self.items == []
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def push(self, item):
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"""Push an item in the stack
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"""
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self.items.append(item)
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def pop(self):
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"""Getting the last item and remove it
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:returns: last item
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"""
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return self.items.pop()
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def peek(self, posi=0):
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"""Getting the last item
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:param posi: which item to peek 0 (last) 1 (the onebefore the last)...
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:returns: the item
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"""
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return self.items[-1 - posi]
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def __len__(self):
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return len(self.items)
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def __str__(self):
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return str(self.items) + " -> "
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def __add__(self, addList):
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return self.items + addList
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def flatten_list(a, result=None):
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"""Flattens a nested list.
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>>> flatten_list([ [1, 2, [3, 4] ], [5, 6], 7])
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[1, 2, 3, 4, 5, 6, 7]
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"""
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if result is None:
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result = []
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for x in a:
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if isinstance(x, list):
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flatten_list(x, result)
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else:
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result.append(x)
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return result
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def first_elem(ll):
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"""Get the first element in imbricates lists
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# TODO: Fonction pourrie mais j'ai pas le temps de faire mieux! |mar. janv. 28 22:32:22 CET 2014
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:param list: list of lists of lists...
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:returns: the first element
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>>> first_elem(1)
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1
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>>> first_elem([1,2])
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1
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>>> first_elem([["abc"]])
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'a'
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>>> first_elem("abc")
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'a'
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>>> first_elem([[[1,2],[3,4]], [5,6]])
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1
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>>> first_elem([[["ab",2],[3,4]], [5,6]])
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'a'
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"""
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if hasattr(ll, '__contains__'):
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if len(ll) == 1 and isinstance(ll, str):
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return ll[0]
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else:
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return first_elem(ll[0])
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else:
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return ll
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def last_elem(ll):
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"""Get the last element in imbricates lists
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# TODO: Fonction pourrie mais j'ai pas le temps de faire mieux! |mar. janv. 28 22:32:22 CET 2014
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:param list: list of lists of lists...
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:returns: the last element
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>>> last_elem(1)
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1
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>>> last_elem([1,2])
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2
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>>> last_elem([["abc"]])
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'c'
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>>> last_elem("abc")
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'c'
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>>> last_elem([[[1,2],[3,4]], [5,6]])
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6
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>>> last_elem([[["ab",2],[3,4]], [5,6]])
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6
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"""
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if hasattr(ll, '__contains__'):
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if len(ll) == 1 and isinstance(ll, str):
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return ll[-1]
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else:
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return last_elem(ll[-1])
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else:
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return ll
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def expand_list(list_list):
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"""Expand list of list
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>>> expand_list([1,2,[3,4],5,[6,7,8]])
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[[1, 2, 3, 5, 6], [1, 2, 4, 5, 7], [1, 2, 4, 5, 8]]
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>>> expand_list([1,2,4,5,6,7,8])
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[[1, 2, 4, 5, 6, 7, 8]]
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"""
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list_in_list = [i for i in list_list if isinstance(i, list)].copy()
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try:
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nbr_ans_list = max([len(i) for i in list_in_list])
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ans = [list_list.copy() for i in range(nbr_ans_list)]
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for (i, l) in enumerate(ans):
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for (j, e) in enumerate(l):
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if isinstance(e, list):
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ans[i][j] = e[min(i, len(e) - 1)]
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# S'il n'y a pas de liste dans la liste (2e exemple)
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except ValueError:
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ans = [list_list]
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return ans
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def add_in_dict(dict1, dict2):
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"""Merge dictionary keys and add the content from dict1 and dict2
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:param dict1: first dictionary
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:param dict2: second dictionary
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:returns: merged and added dictionary
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>>> add_in_dict({'a':1, 'b':2}, {'c':3, 'd': 4}) == {'d': 4, 'a': 1, 'c': 3, 'b': 2}
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True
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>>> add_in_dict({'a':1, 'b':2}, {'a':3, 'b': 4}) == {'a': 4, 'b': 6}
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True
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>>> add_in_dict({'a':1, 'b':2}, {'a':3, 'c': 4}) == {'a': 4, 'b': 2, 'c': 4}
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True
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"""
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new_dict = {}
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new_dict.update(dict1)
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for (k, v) in dict2.items():
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if k in new_dict.keys():
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new_dict[k] += v
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else:
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new_dict[k] = v
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return new_dict
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def remove_in_dict(d, value=0):
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""" In a dictionary, remove keys which have certain value
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:param d: the dictionary
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:param value: value to remove
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:returns: new dictionary whithout unwanted value
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>>> remove_in_dict({'b': 1, 'a': 0}) == {'b': 1}
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True
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>>> remove_in_dict({'b': 1, 'a': 0}, 1) == {'a': 0}
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True
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"""
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new_dict = {}
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for (k, v) in d.items():
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if v != value:
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new_dict[k] = v
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return new_dict
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def convolution_dict(D1, D2, op=lambda x, y: x * y,
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op_key=lambda x, y: x + y,
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commutative=True, op_twice=lambda x, y: x + y):
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"""Convolution of two dictionaries
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:param D1: First dictionary
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:param D2: Second dictionary
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:param op: Operation of perform in value
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:param commutative: keys are commutative?
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:param op_twice: operation on value if the key appear twice
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>>> convolution_dict({"a": 1, "b":3}, {"a":2, "":4}) == {"aa":2, "a": 4, "ba":6, "b":12}
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True
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>>> convolution_dict({"a": 1, "b":3}, {"a":2, "b":4}) == {"aa":2, "ab":10, "bb":12}
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True
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>>> convolution_dict({"a": 1, "b":3}, {"a":2, "b":4}, commutative = False) == {"aa":2, "ab":10, "bb":12}
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False
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>>> convolution_dict({"a": 1, "b":3}, {"a":2, "b":4}, commutative = False) == {"aa":2, "ab":4,"ba":6, "bb":12}
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True
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>>> convolution_dict({"a": 1, "b":3}, {"a":2, "b":4}, \
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op_twice = lambda x,y:[x,y]) == {"aa":2, "ab":[4,6], "bb":12}
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True
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"""
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new_dict = {}
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for k1 in sorted(D1.keys()):
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for k2 in sorted(D2.keys()):
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if op_key(k1, k2) in new_dict.keys():
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key = op_key(k1, k2)
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new_dict[key] = op_twice(new_dict[key], op(D1[k1], D2[k2]))
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elif op_key(k2, k1) in new_dict.keys() and commutative:
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key = op_key(k2, k1)
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new_dict[key] = op_twice(new_dict[key], op(D1[k1], D2[k2]))
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else:
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key = op_key(k1, k2)
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new_dict[key] = op(D1[k1], D2[k2])
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return new_dict
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def spe_zip(l1, l2):
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"""Zip two lists, if a list is longer, only it's element are taken
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>>> spe_zip([1,2], [3,4])
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[[1, 3], [2, 4]]
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>>> spe_zip([1,2], [3,4,5])
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[[1, 3], [2, 4], 5]
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"""
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tmp = list(zip_longest(l1, l2))
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ans = []
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for i in tmp:
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if None in i:
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j = [a for a in i if a is not None][-1]
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else:
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j = list(i)
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ans.append(j)
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return ans
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def transpose_fill(list_lists):
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"""Transpose a list of list and if inside list have not the same length, fill with last token
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:list_lists: a list of list to transpose
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:returns: generator which generate lines of the transposed matrix
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>>> list(transpose_fill([[1], [2, 3], [4, 5, 6]]))
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[[1, 2, 4], [1, 3, 5], [1, 3, 6]]
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"""
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for i in range(max([len(l) for l in list_lists])):
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col = []
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for l in list_lists:
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try:
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col.append(l[i])
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except IndexError:
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col.append(l[-1])
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yield col
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def postfix_op(numbers, operator, neutral = 0):
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"""Convert a list of numbers into a postfix addition
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:numbers: list of numbers
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:operator: the operator to join with
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:neutral: default value if the list is empty
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:returns: Postfix list of succecive attition of number
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>>> from .operator import op
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>>> postfix_op([1], op.add)
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[1]
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>>> postfix_op([1, 2], op.add)
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[1, 2, +]
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>>> postfix_op([1, 2, 3], op.add)
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[1, 2, +, 3, +]
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>>> postfix_op([1, 2, 3], op.mul)
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[1, 2, *, 3, *]
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>>> postfix_op(1, op.add)
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[1]
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>>> postfix_op([], op.add)
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[0]
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>>> postfix_op([], op.mul, 1)
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[1]
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"""
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if not isinstance(numbers, list):
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return [numbers]
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elif numbers == []:
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return [neutral]
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else:
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ans = [[a, operator] if i != 0 else [a]
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for (i, a) in enumerate(numbers)]
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return list(chain.from_iterable(ans))
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def isOperator(exp):
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"""Check if the expression is an opération in "+-*/:^"
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:param exp: an expression
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:returns: boolean
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"""
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# return (type(exp) == str and exp in "+-*/:^")
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try:
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exp.isOperator
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except AttributeError:
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return 0
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return 1
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def isNumber(exp):
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"""Check if the expression can be a number
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:param exp: an expression
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:returns: True if the expression can be a number and false otherwise
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"""
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try:
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exp.isNumber
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except AttributeError:
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if isinstance(exp, int):
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return 1
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else:
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return 0
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return 1
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def isPolynom(exp):
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"""Check if the expression can be a polynom
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:param exp: an expression
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:returns: True if the expression can be a polynom and false otherwise
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>>> from pymath.calculus.polynom import Polynom
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>>> p = Polynom([1,2])
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>>> isPolynom(p)
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1
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>>> isPolynom(1)
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0
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>>> isPolynom("a")
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0
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"""
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try:
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exp._isPolynom
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except AttributeError:
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return 0
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return 1
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def isNumerand(exp):
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"""Check is the expression is something we can compute with
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>>> isNumerand(1)
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1
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>>> from pymath.calculus.polynom import Polynom
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>>> p = Polynom([1,2])
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>>> isNumerand(p)
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1
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>>> from pymath.calculus.fraction import Fraction
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>>> f = Fraction(12)
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>>> isNumerand(f)
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1
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>>> isNumerand("a")
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0
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"""
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return isNumber(exp) or isPolynom(exp)
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if __name__ == '__main__':
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import doctest
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doctest.testmod()
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# -----------------------------
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# Reglages pour 'vim'
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# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
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# cursor: 16 del
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