readlines()方法讀取直到EOF，使用 readline()並返回包含行的列表。如果可選 sizehint 參數存在就不讀取到EOF，全行共計約sizehint位元組(四捨五入到內部緩衝區大小後)被讀取。
當遇到EOF，一個空字元串被返回。
語法
下麵是 readlines()方法的語法方法 -
fileObject.readlines( sizehint );
參數
-
sizehint -- 這是從檔中讀取的位元組數。
返回值
這個方法返回一個包含行的列表。
示例
下麵的例子顯示 readlines()方法的使用。
Assuming that 'foo.txt' file contains following text: This is 1st line This is 2nd line This is 3rd line This is 4th line This is 5th line
#!/usr/bin/python3
# Open a file
fo = open("foo.txt", "r+")
print ("Name of the file: ", fo.name)
line = fo.readlines()
print ("Read Line: %s" % (line))
line = fo.readlines(2)
print ("Read Line: %s" % (line))
# Close opened file
fo.close()
當我們運行上面的程式，會產生以下結果 -
Name of the file: foo.txt
Read Line: ['This is 1st line\n', 'This is 2nd line\n',
'This is 3rd line\n', 'This is 4th line\n',
'This is 5th line\n']
Read Line:
上一篇：
Python3模組
下一篇：
Python3檔方法