try:
 file_name = r'D:\0_Shangbo\Dev\Python\python_work\test.py';
 f = open(file_name) # 以只读方式打开文件
 content = f.read() # 一次读取整个文件
 print(content)
finally:
 f.close() # 文件必须关闭

file_name = r'D:\0_Shangbo\Dev\Python\python_work\test.py';
# 使用 with 打开文件，文件会自动关闭
with open(file_name) as f:
 for line in f: # 逐行读取
 print(line)

file_name = r'D:\0_Shangbo\Dev\Python\python_work\test.py';
# 使用 with 打开文件，文件会自动关闭
with open(file_name) as f:
 for line in f.readlines(): # 逐行读取
 print(line)

file_name = r'D:\0_Shangbo\Dev\Python\python_work\test.py';
# 使用 with 打开文件，文件会自动关闭
with open(file_name) as f:
 lines = list(f)
 print(lines)