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全部文章 / python （共68篇）

one simple example of yield

Write a generator that returns every arrangement of items such that each is in one or none of two different bags. Each combination should be given as...

2020-07-14

0 495

Alphabetical Substrings

Assume s is a string of lower case characters. Write a program that prints the longest substring of s in which the letters occur in alphabetical orde...

2020-07-14

0 442

Counting bobs

Assume s is a string of lower case characters. Write a program that prints the number of times the string 'bob' occurs in s. For example, if s = 'a...

2020-07-14

0 557

Alphabetical Substrings

Assume s is a string of lower case characters. Write a program that prints the longest substring of s in which the letters occur in alphabetical orde...

2020-07-14

0 512

a simple example of trade-off from fibonacci function to fast-fibonacci function

#old recursive fib function def fib(n): if n == 0: return 1 elif n == 1: return 1 else: return fib(n-1)+fib(n-2) p...

2020-07-14

0 537

double_linked_list in Python

class Frob(object): def __init__(self, name): self.name = name self.before = None self.after = None def setBefore(self...

2020-07-14

0 484

mergesort in python

def mergesort(List): """ input : List, an integer list output : an sorted integer list """ n = len(L...

2020-07-14

0 394

check_sudoku

# Define a procedure, check_sudoku, # that takes as input a square list # of lists representing an n x n # sudoku puzzle solution and returns the bool...

2020-07-14

0 515

abacus

######################################################################### # 10-row School abacus # by # ...

2020-07-14

0 518

count_inversions in an integer list

count = 0 def merge_sort(li): if len(li) < 2: return li m = len(li) / 2 return merge(merge_sort(li[:m]), merge_sort(li[m:])) def ...

2020-07-14

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