Python文件读写处理日常任务终极工具实例

# 打开一个文本文件以供读取
file = open('example.txt', 'r')
# 打开一个文本文件以供写入（如果文件不存在则创建）
file = open('output.txt', 'w')
# 打开一个二进制文件以供读取
file = open('binary_data.bin', 'rb')
# 打开一个二进制文件以供写入
file = open('output.bin', 'wb')

file = open('example.txt', 'r')
# 文件操作
file.close()  # 关闭文件

with open('example.txt', 'r') as file:
    # 文件操作
# 文件已在此处自动关闭

file = open('example.txt', 'r')
content = file.read()
file.close()

file = open('example.txt', 'r')
line1 = file.readline()
line2 = file.readline()
file.close()

file = open('example.txt', 'r')
lines = file.readlines()
file.close()

file = open('output.txt', 'w')
file.write('Hello, world!\n')
file.write('This is a new line.')
file.close()

lines = ['Line 1\n', 'Line 2\n', 'Line 3\n']
file = open('output.txt', 'w')
file.writelines(lines)
file.close()

try:
    file = open('example.txt', 'r')
    # 文件操作
except FileNotFoundError:
    print("File not found")
except PermissionError:
    print("Permission denied")
finally:
    file.close()  # 确保文件在最后被关闭

# 读取二进制文件
with open('binary_data.bin', 'rb') as binary_file:
    data = binary_file.read()
# 写入二进制文件
with
 open('output.bin', 'wb') as binary_output:
    binary_output.write(data)