Python檔read()方法

Python檔的read()方法從檔讀取size個位元組。如果在獲取size位元組之前命中EOF，則它只讀取少size位元組的可用數據。

語法

以下是read()方法的語法 -

fileObject.read( size );

參數

• size − 這是要從檔讀取的位元組數。

返回值

• 此方法返回讀取指定size個位元組的字串。

示例

假設’foo.txt‘檔中包含以下行 -

This is 1st line
This is 2nd line
This is 3rd line
This is 4th line
This is 5th line

以下示例顯示了read()方法的用法。

#!/usr/bin/python3

# Open a file
fo = open("foo.txt", "r+")
print ("Name of the file: ", fo.name)

line = fo.read(10)
print ("Read Line: %s" % (line))

# Close opened file
fo.close()

執行上面代碼後，將得到以下結果 -

Name of the file:  foo.txt
Read Line: This is 1s