内置函数

res = '你好'.encode('utf8')
print(res)

b'\xe4\xbd\xa0\xe5\xa5\xbd'

res = bytes('你好', encoding='utf8')
print(res)

b'\xe4\xbd\xa0\xe5\xa5\xbd'

print(chr(65))

A

print(ord('A'))

65

print(divmod(10, 3))

(3, 1)

l = ['a', 'b', 'c']
for i in enumerate(l):
    print(i)

(0, 'a')
(1, 'b')
(2, 'c')

lis = '[1,2,3]'
lis_eval = eval(lis)
print(lis_eval)

[1, 2, 3]

print(hash(1))

1

print(abs(-13))  # 求绝对值

13

print(all([1, 2, 3, 0]))
print(all([]))

False
True

print(any([1, 2, 3, 0]))
print(any([]))

True
False

print(bin(17))
print(oct(17))
print(hex(17))

0b10001
0o21
0x11

import time
print(dir(time))

['_STRUCT_TM_ITEMS', '__doc__', '__loader__', '__name__', '__package__', '__spec__', 'altzone', 'asctime', 'clock', 'ctime', 'daylight', 'get_clock_info', 'gmtime', 'localtime', 'mktime', 'monotonic', 'perf_counter', 'process_time', 'sleep', 'strftime', 'strptime', 'struct_time', 'time', 'timezone', 'tzname', 'tzset']

s = frozenset({1, 2, 3})
print(s)

frozenset({1, 2, 3})

# print(globals())
def func():
    a = 1
#     print(globals())
    print(locals())


func()

{'a': 1}

print(pow(3, 2, 3))  # (3**2)%3

0

print(round(3.5))

4

lis = ['a', 'b', 'c']
s = slice(1, 4, 1)
print(lis[s])  # print(lis[1:4:1])

['b', 'c']

print(sum(range(100)))

4950

m = __import__('time')
print(m.time())

1556607502.334777