python 逐行讀取文本，for 和 while 實現

 for 實現：

import os;

# python 逐行讀取文本
for line in open( "c:\\testLineCount.txt", encoding = "utf-8" ): # 
    print( line );
#

 

while 實現：

path = "C:\\testLineCount.txt"
file1 = open( path, "r", encoding = "utf-8" )

while True:  # 
  mystr = file1.readline()  #表示一次讀取一行
  
  # 讀到數據最後跳出，結束循環。數據的最後也就是讀不到數據了，mystr 爲空的時候
  if mystr == '':  # 或 if not mystr:
    break;

  print( mystr )
# 

file1.close();