python文件操作的几种方法with open,r,w,b

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python文件操作的几种方法：

读：r,rb,r+,r+b
写:w,wb,w+,w+b
加:a,ab,a+,a+b
tell():获取光标的位置
seek:调整光标的位置
flush:强制刷新
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f = open(“中国.txt”,encoding = “utf-8”,mode = “r”)
content = f.read()
print(content)
f.close()

read(n)按照字符去读
f = open(“中国.txt”,encoding = “utf-8”,mode = “r”)
content = f.read(4)
print(content)
f.close()

readline()一行一行读
f = open(“中国.txt”,encoding = “utf-8”,mode = “r”)
content = f.readline()
print(content)
f.close()

readlines()返回一个列表，列表的每个元素就是每行
f = open(“中国.txt”,encoding = “utf-8”,mode = “r”)
content = f.readlines()
print(content)
f.close()

for读取
f = open(“中国.txt”,encoding = “utf-8”,mode = “r”)
for line in f:
print(line)
f.close(

#rb操作非文本的文件