Python入门学习笔记 4.输入输出和读写文件

4.1 输入输出

接受用户的输入： input()
输入格式：str(), format
Code:

str_1 = input("Enter a string: ")
str_2 = input("Enter another string: ")

print("str_1 is: " + str_1 + ". str_2 is :" + str_2)
print("str_1 is {} + str_2 is {}".format(str_1, str_2))

4.2读写文件

1. 写出文件
2. 读入文件

some_sentences = '''\
I love learning python
because python is fun
and also easy to use
'''
#Open for 'w'irting
f = open('sentences.txt', 'w')
#Write text to File,没有输出绝对路径的话，默认在当前目录下创建。
f.write(some_sentences)
f.close()
#If not specifying mode, 'r'ead mode is default
f = open('sentences.txt')
while True:
line = f.readline()
#Zero length means End Of File
if len(line) == 0:
break
print(line)
# close the File
f.close