变量的二维(Double dimension of a variable)

 这是我第一次用Python进行编程（之前我使用过NCL），并且尝试将变量rad_cool和prec的经度维加倍 。 但是我对Python的语法有问题，并得到错误： 
 
IndexError: list assignment index out of range
 
 这是我的代码： 
 
n=np.size(time_sat)
m=np.size(lat_sat)
l=np.size(lon_sat)*2
prec_double=[[n],[m],[l]]
rad_cool_double=[[n],[m],[l]]

for j in range(0,720):
    if(j<=359):
      rad_cool_double[:][:][j]=rad_cool[:][:][j]
      prec_double[:][:][j]=prec[:][:][j]
    else:
       rad_cool_double[:][:][j]=rad_cool[:][:][j-np.size(lon_sat)]
       prec_double[:][:][j]=prec[:][:][j-np.size(lon_sat)] 
 
 任何人都可以帮助我吗？ 
 
 干杯，狮子座 

It is my first time programming with Python (I used NCL before) and I try to double the longitude dimension of my variables rad_cool and prec. But I have a problem with the syntax of Python and get the error: 
 
IndexError: list assignment index out of range
 
That's my code: 
 
n=np.size(time_sat)
m=np.size(lat_sat)
l=np.size(lon_sat)*2
prec_double=[[n],[m],[l]]
rad_cool_double=[[n],[m],[l]]

for j in range(0,720):
    if(j<=359):
      rad_cool_double[:][:][j]=rad_cool[:][:][j]
      prec_double[:][:][j]=prec[:][:][j]
    else:
       rad_cool_double[:][:][j]=rad_cool[:][:][j-np.size(lon_sat)]
       prec_double[:][:][j]=prec[:][:][j-np.size(lon_sat)] 
 
Can anyone help me with that?
 
Cheers, Leo

原文：https://stackoverflow.com/questions/42991256