代码块
是由多行语句组成，：开始。
条件判断语句
- If语句
if 条件 ：
做事情
else:
做事情
if 条件：
做事情
elif 条件：
做事情
else：
做事情实验代码
代码语言：javascript复制# if 语句
score = 60
students = {"zhangsan":80,"lisi":70,"wangwu":40}
if students["wangwu"] >= score:
print("及格了")
elif students["zhangsan"] >= 80:
print("你很优秀")
else:
print("不及格")
a=True
b=True
if a == True:
print(True)
if b == 1:
print(False)输出
代码语言：javascript复制你很优秀循环语句
for循环语句
代码语言：javascript复制for 变量名 in 序列:
todo实验代码
代码语言：javascript复制#For 循环语句
students = ["aa","bbb","ccc","ddd"]
for i in students:
print("students's name is {0}".format(i))
for index in range(len(students)):
if students[index] == i:
print(index)输出
代码语言：javascript复制students's name is aa
0
students's name is bbb
1
students's name is ccc
2
students's name is ddd
3while循环语句
代码语言：javascript复制while 条件=True:
todo实验代码
代码语言：javascript复制#while 语句
a = 11
while a >= 10 :
for i in range(100):
print(i)
if i == 5:
a = i
print(a)break continue语句
- 跳出循环
- 跳出当前循环，继续下次循环
#break continue
for i in range(10):
if i == 5:
break
else:
print(i)
for i in range(10):
if i == 5:
continue
else:
print(i)迭代器
Iterable
代码语言：javascript复制#迭代器
#lterable
from collections import Iterable
num=456
print(isinstance(num, Iterable))
num1 = [1,2,3]
print(isinstance(num1, Iterable))输出
代码语言：javascript复制False
Trueenumerate
代码语言：javascript复制#enumerate
names = ['z','a','b']
print(enumerate(names))
for i,value in enumerate(names):
print(i,value)0 z
1 a
2 b列表推导式
代码语言：javascript复制#列表推导式
numlist = []
for x in range(5):
numlist.append(x)
print(numlist)
#
print([x for x in range(5)])[0, 1, 2, 3, 4]
[0, 1, 2, 3, 4]
