Python雙循環？ while和for循環？

Question

我想遍歷一系列c值？我怎麼做？我試圖有一個for循環或在外面while循環：

注：我想4℃之間，以15 120值

for c in range(4,15): 
    i=0 
    while i< nt-1: #if i<nt-1 is true, the body below will be excuted 
     #Update the acceleration using the following equation 
     x[i+1] = (-y[i]-z[i])*deltat+x[i] 
     #Update the velocity using the follwing equation 
     y[i+1] =(x[i]+a*y[i])*deltat+y[i] 
     #Update the displacement, using follwing equation 
     z[i+1] = (b+z[i]*(x[i]-c))*deltat+z[i] 
     #go to next time step 
     i=i+1 

OR

c=arange(4,15,1) 
for p in c: 
    while i< nt-1: #if i<nt-1 is true, the body below will be excuted 
     #Update the acceleration using the following equation 
     x[i+1] = (-y[i]-z[i])*deltat+x[i] 
     #Update the velocity using the follwing equation 
     y[i+1] =(x[i]+a*y[i])*deltat+y[i] 
     #Update the displacement, using follwing equation 
     z[i+1] = (b+z[i]*(x[i]-p))*deltat+z[i] 
     #go to next time step 
     i=i+1 

Answer 1

既然你已經使用NumPy，以下可能是最自然的：

for c in np.linspace(4, 15, 120): 
    ... 

linspace()調用會產生120個值：

In [33]: np.linspace(4, 15, 120) 
Out[33]: 
array([ 4.  , 4.09243697, 4.18487395, 4.27731092, 
     4.3697479 , 4.46218487, 4.55462185, 4.64705882, 
     4.7394958 , 4.83193277, 4.92436975, 5.01680672, 
     ... 
     14.35294118, 14.44537815, 14.53781513, 14.6302521 , 
     14.72268908, 14.81512605, 14.90756303, 15.  ])