Python学习-文件的基本操作

text = “write a text\nHello word”
print (text)
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结果为:
write a text
Hello word
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my_file = open(“file1.txt”,“w”) #以写入方式创建文件，如果文件不存在就在当前目录创建
my_file.write(text)
my_file.close()

with open(“file2.txt”,“w”) as f2: #清空文件，然后写入
f2.write(“Python\nVery good!”)

with open(“file2.txt”,“a”) as f2: #在文件后面增加内容
f2.write(text)

with open(“file2.txt”,“r”) as f2: #以读取方式打开文件
content = f2.read() #读取全部内容
print(content)
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结果为：
Python
Very good!write a text
Hello word
‘’’

with open(“file2.txt”,“r”) as f2: #以读取方式打开文件
content = f2.readline() #读取第一行内容
print(content)
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结果为：
Python
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with open(“file2.txt”,“r”) as f2: #以读取方式打开文件
content = f2.readlines() #读取所有行内容存放在一个列表中
print(content)
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结果为
[‘Python\n’, ‘Very good!write a text\n’, ‘Hello word’]
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fileName = “file2.txt”
with open (fileName) as f:
for line in f:
print(line.rstrip())
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结果为：
Python
Very good!write a text
Hello word
‘’’