在python文档中,它是为内置函数complex([realimag])编写的:
..or convert a string or number to a complex number.
但当我尝试时:
>>> complex('string')
我得到了:
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
ValueError: complex() arg is a malformed st
我正在使用Python 3.6。
我真的很困惑,为什么会发生这样的事情?
In [1]: import numpy as np
In [2]: a = np.array(-1)
In [3]: a
Out[3]: array(-1)
In [4]: a ** (1/3)
/Users/wonderful/anaconda/bin/ipython:1: RuntimeWarning: invalid value encountered in power
#!/Users/wonderful/anaconda/bin/python
Out[4]: nan
我还是不明白。如果我将Accept-Language头设置为"en“(de,pl,es)以外的任何东西,甚至是不存在的东西(如xxs),则应用程序不会抛出此错误,但当我将其设置为"en”时也会这样做。它只发生在windows (最新的gettext工具)上。下面是堆栈跟踪:
Traceback (most recent call last):
File "E:\projekty\python\myapp_api\_env\lib\site-packages\django\core\han
dlers\exception.py", line 39, in in
我试图用Python编写一个傅立叶变换,这样我就可以从几个信号中获得一些数据,但由于某种原因,我的结果有一个奇怪的负成分。在网上搜索,我找不出我做错了什么。
#Library function calls
import scipy.fft as ft #This library helps with performing the transform
import matplotlib.pyplot as plt #This will allow us to plot the data
import numpy as np #This will allow us to use arrays
#
我刚开始学习Python,并尝试了以下代码:
import math
c = int(input('Enter number: '))
a = 1
counter = 0
while counter != 2:
a = a + 1
b = round((c-(a**3))**(1/3.0))
if a < b and a**3 + b**3 == c:
counter = counter + 1
print(a,b)
我的问题是python不能绕过'b‘,因为它被看作是一个复数.
该程序应该找到满足
我在表单验证时遇到了这个错误。
对于验证器中的验证器: TypeError:'Length‘对象不可迭代
from flask_wtf import FlaskForm
from wtforms import StringField,PasswordField,SubmitField
from wtforms.validators import Length
class RegisterForm(FlaskForm):
username=StringField(label='User Name',validators=Length(2,30))
我正在尝试列出0到500之间的所有数字,这些数字可以通过将25和40相加来达到。 这说明了我的问题: j = 1
i = 5
if type(i) == type(500):
print("You're good to go!")
else:
print("No dice.")
while i <= 500:
j += 1
i = 5j You're good to go!
Traceback (most recent call last):
File "C:/Users/Lyndon (d
我的学习代码有一些问题,因为它在执行时返回以下错误
误差
Traceback (most recent call last):
File "tf_apprentissage/main.py", line 109, in <module>
f_de_x = model(x) # permet de déterminer ce qu'est l'image (y = f(x) )
File "tf_apprentissage/main.py", line 91, in model
c9 = dense(c7, (-1,100, 2
yum update
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
/usr/lib/python2.4/site-packages/cElementTree.so: wrong ELF class: ELFCLASS32
Please install a package which provides this module, or
verify that the module is install
如果用户有禁止成员的权限,我希望bot使这个命令操作,但是当我运行代码时,由于@commands.has_permissions(ban_member=True)下面的代码(代码中的第42行)中的这一行代码,我得到了错误
如果我删除了@commands.has_permissions(ban_member=True),它是工作的,但是任何人都可以修改json文件,我不想这样做。
如何修复此错误?
def write_json(data,filename="blacklistedWords.json"):
with open(filename,"w") a