python - 文本文件中的小写

Question

我有一个文件，正在尝试将单词转换为小写。这是我到目前为止所拥有的

with open('example.txt', 'r') as fileinput:
   for line in fileinput:
       lines = fileinput.lower()

AttributeError: 'file' object has no attribute 'lower'

Answer 1

您正在小写文件对象，而不是行。

with open('example.txt', 'r') as fileinput:
   for line in fileinput:
       line = line.lower()

会更好..

Answer 2

代替

lines = fileinput.lower()

把这个：

line = line.lower()

完整代码：

with open('example.txt', 'r') as fileinput:
    for line in fileinput:
        line = line.lower()

这将毫无错误地工作。

Answer 3

这是用于此目的的一行代码

file = open('example.txt', 'rt').read().lower()

Answer 4

with open('example.txt', 'r') as fileinput:
   for line in fileinput:
       line = line.lower()
       #do something

Answer 5

with open('example.txt', 'r') as fileinput:
   for line in fileinput:
       line = line.rstrip().upper()
       print line