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  • Python备忘录

    提取某个路径下的所有文件夹的名字

    import os
    path='./somepath'
    l = os.listdir(path)
    print l
    

    提取某个路径下所有的文件

    from os import walk
    f = []
    for (dirpath, dirnames, filenames) in walk(mypath):
        f.extend(filenames)
        break
    

    逐行读取文件

     with open(filename) as fp:            
                for line in fp:
    

    复制文件

    from shutil import copyfile
    copyfile(src, dst)
    

    给字典排序

    sorted_cat = sorted(catNinstance.items(), key=operator.itemgetter(1),reverse=True)
    

    matplot cmap

    import matplotlib.pyplot as plt
    
    figsim, ax = plt.subplots(figsize=(15,15))
    # vmin vmax用于固定颜色范围,确保在不同的figure中,同一个值对应的颜色相同
    cax = ax.matshow(sub_prob_matrix, interpolation='nearest',cmap=plt.cm.Blues_r,vmin=0, vmax=1)
    ax.grid(True)
    #plt.title('Title')
    plt.xticks(range(n_w), labels, rotation=90,size=20);
    plt.yticks(range(n_w), labels,size =20);
    figsim.colorbar(cax, ticks=[0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0])
    plt.show()
    figsim.savefig('name.pdf')
    figsim.savefig('name.png')
    

    颜色表选项:
    https://matplotlib.org/examples/color/colormaps_reference.html

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  • 原文地址:https://www.cnblogs.com/zhsuiy/p/8083124.html
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