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[英]why am I getting a ZeroDivisionError: integer division or modulo by zero?
[英]Why am I getting `ZeroDivisionError: float division by zero` error?
我想在 y=0 处找到函数的 x 值。
from pynverse import inversefunc
from math import pi,sqrt
R=20
C=5*10**-9
L=5*10**-4
Z= (lambda x: sqrt(R**2+(1/(2*pi*C*x)-2*pi*L*x)**2))
inversefunc(Z,y_values=0)
但我收到以下错误代码:
Traceback (most recent call last):
File "<pyshell#16>", line 1, in <module>
inversefunc(Z,y_values=0)
File "C:\Python27\lib\site-packages\pynverse\inverse.py", line 113, in inversefunc
trend = np.sign(func(ref2, *args) - func(ref1, *args))
File "<pyshell#15>", line 1, in <lambda>
Z= (lambda x: sqrt(R**2+(1/(2*pi*C*x)-2*pi*L*x)**2))
ZeroDivisionError: float division by zero
请帮我看看为什么! 谢谢你。
当除数为 0 时,您可以通知答案未定义,您应该使用普通函数,而不是 Python 中的命名 lambdas。
from pynverse import inversefunc
from math import pi,sqrt
def Z(x):
# Can define these globally if necessary.
R = 20
C = 5 * 10**-9
L = 5 * 10**-4
return sqrt(R**2 + (1/(2*pi*C*x) - 2*pi*L*x)**2))
try:
inversefunc(Z, y_values=0)
except ZeroDivisionError:
print("answer is undefined")
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