Question

我有一些文字：

228;u;Ali;
129;cr;Daan;
730;c;Arton;
466;cr;Frynk;
314;c;Katuhkay;
9822;c;Kinberley;

我想将此文本写入文件，但我只想写出带符号的行'; cr;'

Answer 1

with open("input.csv", "r") as inp, open("output","w") as out:
    inpList = inp.read().split()
    out.write('\n'.join(el for el in inpList if ';cr;' in el))

如果您希望从网络上读取数据，请使用以下命令：

from urllib2 import urlopen
inp = urlopen("<URL>")
with open("output","w") as out:
    inpList = inp.read().split()
    out.write('\n'.join(el for el in inpList if ';cr;' in el))

read()一次读取整个文件。 split()将其拆分为由空格分隔的列表。

read(...)
    read([size]) -> read at most size bytes, returned as a string.

    If the size argument is negative or omitted, read until EOF is reached.

为了写入文件，'\n'.join([elem1,...])从包含'; cr;'的所有inpList元素创建一个字符串。此字符串传递给write(str)，它将字符串输出到输出文件。

Python按掩码排序

1 个答案: