TypeError unsupported operand type s for list and list

Question

This is my part of code, why it shows: TypeError: unsupported operand type(s) for /: 'list' and 'list'
<Figure size 576x288 with 0 Axes>

plt.figure(figsize=(8, 4))
plt.scatter(p_vol, p_ret,c=p_ret / p_vol, marker='o')

plt.scatter(t_vol, trets,c=trets / t_vol, marker='x')

plt.plot(statistics(opts['x'])[1], statistics(opts['x'])[0],'r*', markersize=15.0)
# portfolio with highest Sharpe ratio
plt.plot(statistics(optv['x'])[1], statistics(optv['x'])[0],'y*', markersize=15.0)
# minimum variance portfolio
plt.grid(True)
plt.xlabel('expected volatility')
plt.ylabel('expected return')
plt.colorbar(label='Sharpe ratio')

Comments

Hey, @Noman,

Just check that you have defined plt in your code or not, probably you are getting this error because of that.

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Its shows this error everything is fine 

TypeError                                 Traceback (most recent call last)
<ipython-input-334-7d2a34ebfdb9> in <module>
      1 plt.figure(figsize=(8, 4))
----> 2 plt.scatter(p_vol, p_ret,c=p_ret / p_vol, marker='o')
      3                 # random portfolio composition
      4 plt.scatter(t_vol, trets,c=trets / t_vol, marker='x')
      5             # efficient frontier

TypeError: unsupported operand type(s) for /: 'list' and 'list'

<Figure size 576x288 with 0 Axes>

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Hey, @Noman,

It might be because you are running the loops for the complete length of data.