import random
import string
ALL_CHARS = string.digits + string.ascii_letters
print(ALL_CHARS)
def generate_code(code_len = 4):
return ''.join(random.choices(ALL_CHARS, k = code_len))
def get_suffix(filename):
pos = filename.rfind('.')
if pos <= 0:
return ''
return filename[pos + 1:]
print(get_suffix('maxiaoyang.mahuan'))
def calc(*args):
result = 0
for arg in args:
if(type(arg) in (int, float)):
result += arg
return result
print(calc(1, 2, 3))
def cal(*args, **kwargs):
result = 0
for arg in args:
if type(arg) in (int, float):
result += arg
for value in kwargs.values():
if type(value) in (int, float):
result += value
return result
print(calc())
print(cal(1, 2, 3))
print(cal(1, 2, d=4, a=2))
def ca(*args, init_value, op, **kwargs):
result = init_value
for arg in args:
if type(arg) in (int, float):
result = op(result, arg)
for value in kwargs.values():
if type(value) in (int, float):
result = op(result, value)
return result
def add(x, y):
return x + y
def mul(x, y):
return x * y
print(ca(1, 2, 3, init_value=0, op=mul, x=6))
def is_even(num):
return num % 2 == 0
def square(num):
return num ** 2
numbers1 = [35, 12, 8, 99, 60, 52]
numbers2 = list(map(square, filter(is_even, numbers1)))
print(numbers2)
numbers2 = [num ** 2 for num in numbers1 if num % 2 == 0]
print(numbers2)
numbers1 = [35, 12, 8, 99, 60, 52]
numbers2 = list(map(lambda x: x ** 2, filter(lambda x: x % 2 == 0, numbers1)))
print(numbers2)
def calc1(*args, init_value=0, op=lambda x, y: x + y, **kwargs):
result = init_value
for arg in args:
if type(arg) in (int, float):
result = op(result, arg)
for value in kwargs.values():
if type(value) in (int, float):
result = op(result, value)
return result
print(calc1(1, 2, 3, x=4, y=5))
print(calc1(1, 2, 3, x=4, y=5, init_value=1, op=lambda x, y: x * y))