Python3 file.writelines()方法

writelines()方法讀取字串的序列到檔案。該序列可以是一個疊代物件生產的字串，通常是字串列表。這個函式沒有返回值。

語法

下面是 writelines()方法的語法 -

fileObject.writelines( sequence )

引數

sequence -- 這是字串的序列。

返回值

此方法不返回任何值。

範例

下面的例子顯示 writelines()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 in read/write mode
fo = open("abc.txt", "r+")
print ("Name of the file: ", fo.name)

seq = ["This is 6th line\n", "This is 7th line"]
# Write sequence of lines at the end of the file.
fo.seek(0, 2)
line = fo.writelines( seq )

# Now read complete file from beginning.
fo.seek(0,0)
for index in range(7):
   line = next(fo)
   print ("Line No %d - %s" % (index, line))

# Close opened file
fo.close()

當我們執行上面的程式，會產生以下結果 -

Name of the file:  foo.txt
Line No 0 - This is 1st line

Line No 1 - This is 2nd line

Line No 2 - This is 3rd line

Line No 3 - This is 4th line

Line No 4 - This is 5th line

Line No 5 - This is 6th line

Line No 6 - This is 7th line