# Diffeqpy complex ODE
**URL:** https://discourse.julialang.org/t/diffeqpy-complex-ode/44530
**Category:** General Usage
**Tags:** package, diffeq, ode
**Created:** [August 7, 2020, 11:49pm UTC](https://discourse.julialang.org/t/diffeqpy-complex-ode/44530 "2020-08-07T23:49:09Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@m4hdiattar](https://discourse.julialang.org/u/m4hdiattar)
#### Post date: [August 7, 2020, 11:49pm UTC](https://discourse.julialang.org/t/diffeqpy-complex-ode/44530/1 "2020-08-07T23:49:09Z")
I am using diffeqpy package for solving my problem which is a system of complex ODEs.
problem here is that it seems like the function ODEProblem is not working on complex equations and I got the error below:
can anyone help?
```julia
def Dz(dz, z, p, t):
C = np.zeros(8)
for i in range(n):
for j in range(n):
C[i] = C[i] + (1/n) * W[i,j] * z[j]
# print('C =', C[7])
# print('z = ', z[7])
dz[0] = complex(c, w) * z[0] + complex(a, b) * z[0] * (abs(z[0])) ** 2 + C[0]
dz[1] = complex(c, w) * z[1] + complex(a, b) * z[1] * (abs(z[1])) ** 2 + C[1]
dz[2] = complex(c, w) * z[2] + complex(a, b) * z[2] * (abs(z[2])) ** 2 + C[2]
dz[3] = complex(c, w) * z[3] + complex(a, b) * z[3] * (abs(z[3])) ** 2 + C[3]
dz[4] = complex(c, w) * z[4] + complex(a, b) * z[4] * (abs(z[4])) ** 2 + C[4]
dz[5] = complex(c, w) * z[5] + complex(a, b) * z[5] * (abs(z[5])) ** 2 + C[5]
dz[6] = complex(c, w) * z[6] + complex(a, b) * z[6] * (abs(z[6])) ** 2 + C[6]
dz[7] = complex(c, w) * z[7] + complex(a, b) * z[7] * (abs(z[7])) ** 2 + C[7]
return dz
z0 = [1, 1, 0, 0, 0, 0, 1, 1]
tspan = (0.0, 100.0)
numba_Dz = numba.jit(Dz)
prob = de.ODEProblem(numba_Dz, z0, tspan)
sol = de.solve(prob)
```
```julia
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
in ()
5
6 prob = de.ODEProblem(numba_Dz, z0, tspan)
----> 7 sol = de.solve(prob)
TypeError: can't convert complex to float
```
---
### Author:  [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)
#### Post date: [August 8, 2020, 1:02am UTC](https://discourse.julialang.org/t/diffeqpy-complex-ode/44530/2 "2020-08-08T01:02:43Z")
I’m not sure whether pyjulia handles this case. This might be a case that’s easier to do directly from Julia for right now.