使用 for 循环遍历 Python 字典

# 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
    s1 += i
print(s1)

print(1>2)

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)

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

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

n=6
print('n+1')

print(21/7==3 and 7)

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

print(4**2-6/2)

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

n=eval('6+8/2')   #1111111111111111
print(n)


dic = {'name':'jack','age':15,'number':1804}  #1111111111111111
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')