python之文件读取

# 方法1
fd = open("D:/project/python_project/com/baidu/uos/demo.text", "r", encoding="utf-8")
print(fd.read())
fd.close()
# 等价于方法2
try:
    fd = open("D:/project/python_project/com/baidu/uos/demo.text", "r", encoding="utf-8")
    print(fd.read())
finally:
    if fd:
        fd.close()
# 等价于方法3
with open("D:/project/python_project/com/baidu/uos/demo.text", "r", encoding="utf-8") as fd:
    print(fd.read())