python如何逐行读取文件内容

f = open("foo.txt")               # 返回一个文件对象  

line = f.readline()               # 调用文件的 readline()方法  

while line:  

    print line,                   # 后面跟 ',' 将忽略换行符  

    #print(line, end = '')　      # 在 Python 3 中使用  

    line = f.readline()  

f.close()

for line in open("foo.txt"):  

    print line

f = open("c:\\1.txt","r")  

lines = f.readlines()      #读取全部内容 ，并以列表方式返回 

for line in lines  

    print line

file_object = open('thefile.txt')  try: 

     all_the_text = file_object.read()  finally: 

     file_object.close()