python函数参数函数 python函数的5种参数详解( 三 )


n1 = 255
print(str(hex(n1)))
def my_abs(x):
# 增加python函数参数函数了参数python函数参数函数的检查
if not isinstance(x, (int, float)):
raise TypeError('bad operand type')
if x = 0:
return x
else:
return -x
print(my_abs(-3))
def nop():
pass
if n1 = 255:
pass
def move(x, y, step, angle=0):
nx = x + step * math.cos(angle)
ny = y - step * math.sin(angle)
return nx, ny
x, y = move(100, 100, 60, math.pi / 6)
print(x, y)
tup = move(100, 100, 60, math.pi / 6)
print(tup)
print(isinstance(tup, tuple))
def quadratic(a, b, c):
k = b * b - 4 * a * c
# print(k)
# print(math.sqrt(k))
if k0:
print('This is no result!')
return None
elif k == 0:
x1 = -(b / 2 * a)
x2 = x1
return x1, x2
else:
x1 = (-b + math.sqrt(k)) / (2 * a)
x2 = (-b - math.sqrt(k)) / (2 * a)
return x1, x2
print(quadratic(2, 3, 1))
def power(x, n=2):
s = 1
while n0:
n = n - 1
s = s * x
return s
print(power(2))
print(power(2, 3))
def enroll(name, gender, age=8, city='BeiJing'):
print('name:', name)
print('gender:', gender)
print('age:', age)
print('city:', city)
enroll('elder', 'F')
enroll('android', 'B', 9)
enroll('pythone', '6', city='AnShan')
def add_end(L=[]):
L.append('end')
return L
print(add_end())
print(add_end())
print(add_end())
def add_end_none(L=None):
if L is None:
L = []
L.append('END')
return L
print(add_end_none())
print(add_end_none())
print(add_end_none())
def calc(*nums):
sum = 0
for n in nums:
sum = sum + n * n
return sum
print(calc(1, 2, 3))
print(calc())
l = [1, 2, 3, 4]
print(calc(*l))
def foo(x, y):
print('x is %s' % x)
print('y is %s' % y)
foo(1, 2)
foo(y=1, x=2)
def person(name, age, **kv):
print('name:', name, 'age:', age, 'other:', kv)
person('Elder', '8')
person('Android', '9', city='BeiJing', Edu='人民大学')
extra = {'city': 'Beijing', 'job': 'Engineer'}
person('Jack', 24, **extra)
def person2(name, age, *, city, job):
print(name, age, city, job)
person2('Pthon', 8, city='BeiJing', job='Android Engineer')
def person3(name, age, *other, city='BeiJing', job='Android Engineer'):
print(name, age, other, city, job)
person3('Php', 18, 'test', 1, 2, 3)
person3('Php2', 28, 'test', 1, 2, 3, city='ShangHai', job='Pyhton Engineer')
def test2(a, b, c=0, *args, key=None, **kw):
print('a =', a, 'b =', b, 'c =', c, 'args =', args, 'key=', key, 'kw =', kw)
test2(1, 2, 3, 'a', 'b', 'c', key='key', other='extra')
args = (1, 2, 3, 4)
kw = {'d': 99, 'x': '#'}
test2(*args, **kw)
Python中enumerate()函数的参数有哪些呢?在 Python 中python函数参数函数,enumerate() 函数是一个内置函数,用于将一个可迭代对象转换为一个枚举对象,其中每个元素都由一个索引和一个对应的值组成 。enumerate() 函数有两个可选参数python函数参数函数:
enumerate(iterable, start=0):
其中 iterable 表示要枚举的可迭代对象,而 start 表示索引的起始值,缺省值为 0 。
例如,以下代码将一个列表转换为一个枚举对象,并输出每个元素的索引和值:
请点击输入图片描述
输出结果如下:
在上面的代码中 , enumerate() 函数将 my_list 列表转换为一个枚举对象 , 并使用 for 循环遍历该枚举对象 。在循环中,每个元素都由一个索引和一个值组成,这些值分别由变量 i 和 val 来接收 。

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