类似问号表达式

Categories: Python
expression and truevalue or falsevalue a = reduce(lambda x, y: x > y and x or y, [9, 7, 9, 8, 100])

failed with error code 1

Categories: Python
command “python setup.py egg_info” failed with error code 1 in … 解决方法: pip install distribute

杂项

Categories: Python
enumerate将其组成一个索引序列,利用它可以同时获得索引和值 for lineno, line in enumerate(self.lines, 1): 迭代器切片 for x in itertools.islice(c, 10, 20): 跳过可迭代对象的开始部分 for line in dropwhile(lambda l: l.startswith('#'), f): 跳过所有#开头字符串 lines = (line for line in f if not line.startswith('#')) 排列迭代 for p in permutations(items, 2): 组合迭代 for c in combinations(items, 2): for c in combinations_with_replacement(items, 2): 同时迭代多个序列 for xv, yv in zip(x, y): 迭代多个序列,短的序列补0 for xv, yv in zip_longest(x, y, fillvalue=0): 不同集合上元素的迭代 for x in chain(a, b): 按顺序迭代已排序序列

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