python qqplot 一页多图

不知道怎么一页多图2x2那种。搜索了很多还是找不到，现在求助下。

1. import numpy as np
   
2.     import pandas as pd
   
3.     import scipy.stats as scs
   
4.     import statsmodels.api as sm
   
5.     from pylab import plt
   
6.     plt.style.use('ggplot')
   
7.     import matplotlib as mpl
   
8. 
   
9.     symbols = ['SPY', 'GLD', 'AAPL.O', 'MSFT.O']
   
10.     raw = pd.read_csv('tr_eikon_eod_data.csv',
    
11.                     index_col=0, parse_dates=True)
    
12.     data = raw[symbols]
    
13.     data = data.dropna()
    
14.     log_returns = np.log(data / data.shift(1))
    
15. 
    
16. 
    
17.     fig, ax = plt.subplots(2, 2, figsize=(6,4))
    
18.        for sym in symbols:
    
19.           sm.qqplot(log_returns[sym].dropna(),line='s',ax=ax[sym])
    
20. 
    
21. 
    
22.     plt.grid(True)
    
23.     plt.xlabel('theoretical quantiles')
    
24.     plt.ylabel('sample quantiles')
    
25.     plt.title(sym)
    
26. 
    
27.     plt.show   

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