Python-文件操作

data = open("file").read()

# print(data)

# 只读
file = open("file", 'r')  # 文件句柄
data = file.read()
print(data)

# 只写 创建一个新文件
file2 = open("file2", "w")
file2.write("我爱Python")

# 可追加 不可读
file3 = open("file2", "a")
file3.write("呵呵呵呵")

# 高效循环，需要自己计算下标
file = open("file")
for i in file:
    print(i)

# 操作光标
# file = open("file")
# print("光标位置",file.tell())
# print(file.readline())
# print(file.tell())
# file.seek(0)#
# print(file.tell())

# 只写截断
file = open("file",'w')
file.truncate(1)


# file = open("file", 'r+')  # 读写
# file = open("file", 'w+')  # 写读
# file = open("file", 'a+')  # 追加读写
# file = open("file", 'rb')  # 读二进制文件
# file = open("file", 'wb')  # 写二进制文件
# print(file.readline())
# print(file.readline())
# print(file.readline())
# file.write("哈哈哈哈\n")
# file.write("呵呵呵\n")

# 更改文件
# file_old = open("file")
# file_new = open("file2",'w')
#
# for i in file_old:
#     if "这是寿光唯一的山。" in i:
#         i = i.replace("这是寿光唯一的山。","这是寿光全部的山。")
#     file_new.write(i)

# 操作完自动关闭
# with open("file", "r") as f, \
#         open("file", "r") as f2:
#     print(f.readline())