#!/usr/bin/env python
# -*- coding: utf-8 -*-
u"""文档说明（编码规范）(u开头，结尾.)."""
print("Python")
1.格式化&读写文件:
import math
print("The value of Pi is {}.".format(math.pi))
print("The value of Pi is {!r}.".format(math.pi))
print("THe value of Pi is {0:.5f}.".format(math.pi))
table = {"Tom": 7714, "Jack": 8970, "Andy": 9078}
for name, number in table.items():
print("{0:5} ==> {1:4d}".format(name, number))
pass
f = open("test.txt", "r")
# 遍历
for line in f:
print(line)
pass
f.close()
# 写入文件
f = open("test.txt", "w")
f.write("This is a test\n.")
print ("done")
f.close()
# With 打开(自动关闭)
with open("test.txt", "r") as f:
read_data = f.read()
print(read_data)
print(f.closed)
