I have written this code fig, (axis1, axis2,axis3, axis4)=plt.subplots(2,2,figsize=(10,4)) and I am getting this error ValueError: not enough values to unpack (expected 4, got 2) I tried many ways to remove this error but all was in vain. Can you explain to me why I am getting this error?

  • $\begingroup$ try: x = plt.subplots(2,2,figsize=(10,4)); print(x). what does it say? $\endgroup$ – Stephen Rauch Jun 20 '18 at 1:58

Its because you have not looked how the values are packed in plt.subplot function.

>>> plt.subplots(2,2,figsize=(10,4))
(<matplotlib.figure.Figure at 0xa3918d0>, array([[<matplotlib.axes._subplots.AxesSubplot object at 0x000000000A389470>,
     <matplotlib.axes._subplots.AxesSubplot object at 0x000000000A41AD30>],
    [<matplotlib.axes._subplots.AxesSubplot object at 0x000000000A6F7EB8>,
     <matplotlib.axes._subplots.AxesSubplot object at 0x000000000BC232E8>]], dtype=object))

Instead of unpacking all values at once, unpack in steps. You will get a better idea then.

For your solution, to unpack -

>>> fig, [[axis1, axis2],[axis3, axis4]] = plt.subplots(2,2,figsize=(10,4))
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The second return value will be a 2x2 array. Try this.

fig, ((ax1, ax2), (ax3, ax4)) = plt.subplots(2,2,figsize=(10,4))
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