10-1 Python学习笔记
代码：
with open('learning_python.txt') as fo:
content = fo.read()
print(content)
print("------------------------------------------------")
with open('learning_python.txt') as fo:
for line in fo:
print(line.rstrip())
print("------------------------------------------------")
with open('learning_python.txt') as fo:
lines = fo.readlines()
for line in lines:
print(line.rstrip())
运行结果：
10-4 访客名单
代码：
with open('guest_book.txt','w') as fo:
while(True):
name = input("Please enter your name: ")
if name=='q':
break
message = "Hello, " + name + "!\n"
print(message)
fo.write(message)
运行结果：
10-7 加法计算器
代码：
while True:
a = input("You are plusing two numbers.Please enter the first number: ")
b = input("Please enter the other number: ")
try:
a = int(a)
b = int(b)
except ValueError:
print("Your enter is invalid, please enter again.")
continue
else:
c = a+b
print("The sum is " + str(c) + ".")
break
运行结果：
10-12 记住喜欢的数字
代码：
运行结果：
import json
try:
with open('number.json') as f_obj:
content = f_obj.read()
except FileNotFoundError:
with open('number.json','w') as f_obj:
number = input("Please enter your favorite number: ")
message = "I know your favorite number, it's " + number + "!"
json.dump(message,f_obj)
else:
print(content)
第一次：
第二次：