使用 for 循环遍历 Python 字典

大家猴啊 / 2023-04-28 / 原文

# list 切片后仍是list
list=['a','b','c','d']
print(list[:2]) # ['a', 'b'] 结果为list
print(list[:1]) # ['a'] ▲结果仍为list



s='hello'
s1=''
for i in s:
    if i=='e':
        continue    # 使用continue语句跳出当前循环迭代
    s1 += i
print(s1)

print(1>2)      # False

n=input()
n = int(n)
print(n>4 or n<4)

n,m = 2,3
if n<m:
    n,m = m+2,n
print(n,m)    # 5,2

# list 切片后仍是list
list=['a','b','c','d']
print(list[:2])   # ['a', 'b']
print(list[:1])   # ['a']

n=input()
m=input()
print(n+m)    # n m 均为字符串，+ 作为字符串连接用

n=9
m=8
n = n*m-n    # n = 8*9 -9 =63
m = n-5*m      # m = 63 - 5*8
print(m)    #23

n=10
m=20
if n==10 or m==40:
    print('hello')    # 输出 hello
else:
    print('world')    

n=6
print('n+1')   # n+1

print(21/7==3 and 7)   # 7

sum = 0
num = [1,8,0,4]
for i in num:
    if i<5:    # 跳过8
        sum += i
print(sum)     # 5

print(4**2-6/2)    # 13.0

n=0
m = 0 or 1     # 1
print(n==m)   # False

n=eval('6+8/2')   # 
print(n)    #10.0

#eval是Python的一个内置函数，这个函数的作用是，返回传入字符串的表达式的结果

dic = {'name':'jack','age':15,'number':1804} for i in dic: # i 为字典键 print(i[:1]) # ame  ge   umber str = 'hello' str= str.split('e')[1][1] print(str) print('abc'>'ac')

　使用 for 循环遍历 Python 字典　https://baijiahao.baidu.com/s?id=1713928110213127319&wfr=spider&for=pc