将PANDAS DATAFRAME另存为图像中的表或PDF文档中的表格

Question

我正在尝试在PDF中的报告中包含一个带有多指数的数据框架。我想拥有一个不错的表输出。

我找到了这两个解决方案：

pandas.df-> html-> pdf

    import pandas as pd
    from IPython.display import HTML
    import pdfkit
    # df generation
    df = pd.read_csv(path_to_csv, sep =',')
    groupeddf = df.groupby('Cluster')
    res = groupeddf.describe([0.05, 0.5, 0.95])
    res.index.rename(['Cluster', 'stats'], inplace=True)
    res['Cluster'] = res.index.get_level_values('Cluster')
    res['stats'] = res.index.get_level_values('stats')
    populations = (res.iloc[(res.index.get_level_values('stats') == 'count'), 
                                                            0].values).tolist()
    res['population'] = [populations[i] for i in res.index.labels[0].values()]
    total_pop = sum(populations)
    res['frequency'] =(res['population']/total_pop).round(3)
    res.set_index(['Cluster', 'population','frequency', 'stats'], inplace=True)

    res1 = res.iloc[(res.index.get_level_values('stats') == '5%') |
    (res.index.get_level_values('stats') == 'mean') |
    (res.index.get_level_values('stats') == '50%') |
    (res.index.get_level_values('stats') == '95%')]
    res1 = res1.round(2)
    # saving the df     
    h = HTML(res1.to_html())
    my_file = open('test.html', 'w')
    my_file.write(h.data)
    my_file.close()

    options = {
        'orientation': 'Landscape'
        }
    with open('test.html') as f:
        pdfkit.from_file(f, 'out.pdf', options=options)

，但这对pdfkit有一个依赖，这使我们困难。这就是为什么我要尝试使用pandas.df-> tex-> pdf（如导出pandas dataframe作为表图像中的提及）

）

    import pandas as pd
    import os
    # df generation              
    df = pd.read_csv(path_to_csv, sep =',')
    groupeddf = df.groupby('Cluster')
    res = groupeddf.describe([0.05, 0.5, 0.95])
    res.index.rename(['Cluster', 'stats'], inplace=True)
    res['Cluster'] = res.index.get_level_values('Cluster')
    res['stats'] = res.index.get_level_values('stats')
    populations = (res.iloc[(res.index.get_level_values('stats') == 'count'), 
                                                            0].values).tolist()
    res['population'] = [populations[i] for i in res.index.labels[0].values()]
    total_pop = sum(populations)
    res['frequency'] =(res['population']/total_pop).round(3)
    res.set_index(['Cluster', 'population','frequency', 'stats'], inplace=True)

    res1 = res.iloc[(res.index.get_level_values('stats') == '5%') |
    (res.index.get_level_values('stats') == 'mean') |
    (res.index.get_level_values('stats') == '50%') |
    (res.index.get_level_values('stats') == '95%')]
    res1 = res1.round(2)
    res1.rename(columns=lambda x: x.replace('_', ' '), inplace=True)    
    #latex
    template = r'''documentclass[preview]{{standalone}}
    usepackage{{booktabs}}
    begin{{document}}
    {}
    end{{document}}
    '''
    with open("outputfile.tex", "wb") as afile: 
        afile.write(template.format(res1.to_latex()))
    os.system("pdflatex outputfile.tex")

但是，我对乳胶不熟悉，我得到了这个错误：

  ! LaTeX Error: File `standalone.cls' not found.
 Type X to quit or <RETURN> to proceed,
 or enter a new name. (Default extension: cls)

对pandas.df-> pdf？

Answer 1

对我有用的解决方案：用熊猫> = 0.17我安装了pdflatex。我复制了乳胶包，例如booktabs.sty，geograph..sty和pdflscape.sty

import pandas as pd
import os
import math
def save_summary_table_as_pdf(path_to_csv, path_to_output_folder):
    pwd = os.getcwd()
    df = pd.read_csv(path_to_csv, sep =',')
    #data preparation
    groupeddf = df.groupby('Cluster')
    res = groupeddf.describe([0.05, 0.5, 0.95])
    res.index.rename(['Cluster', 'Stats'], inplace=True)
    res['cluster'] = res.index.get_level_values('Cluster')
    res['stats'] = res.index.get_level_values('Stats')
    populations = (res.iloc[(res.index.get_level_values('Stats') == 'count'), 
                                                            0].values).tolist()
    res['population'] = [populations[i] for i in res.index.labels[0].values()]
    total_pop = sum(populations)
    res['frequency'] =(res['population']/total_pop).round(3)
    res.set_index(['cluster', 'population','frequency', 'stats'], inplace=True)
    res1 = res.iloc[(res.index.get_level_values('stats') == '5%') |
    (res.index.get_level_values('stats') == 'mean') |
    (res.index.get_level_values('stats') == '50%') |
    (res.index.get_level_values('stats') == '95%')]
    res1 = res1.round(2)
    res1.rename(columns=lambda x: x.replace('_', ' '), inplace=True)  
    #latex
    nbpages = int(math.ceil(res1.shape[0]*1.0/40))
    templatetop = r'''documentclass[a3paper, 5pt]{article}
    usepackage{booktabs}
    usepackage{pdflscape}
    usepackage[a4paper,bindingoffset=0.2in,%
            left=0.25in,right=0.25in,top=1in,bottom=1in,%
            footskip=.25in]{geometry}
    begin{document}
    begin{landscape}
    pagenumbering{gobble}
    oddsidemargin = 0pt
    hoffset = -0.25in
    topmargin = 1pt
    headheight = 0pt
    headsep = 0pt
    '''
    templatebottom = '''
    end{landscape}
    end{document}
    '''
    output_folder_path_abs = path_to_output_folder
    output_tex = os.path.join(output_folder_path_abs, 
    "clustering_summary_table.tex")
    with open(output_tex, "wb") as afile: 
        afile.write(templatetop +'n')
        for i in range(0, nbpages):
            afile.write(res1.iloc[(i*40):((i+1)*40), :].to_latex() +'n' + 
                                                """pagenumbering{gobble}""")
        afile.write(templatebottom +'n')
    os.chdir(output_folder_path_abs)
    os.system('pdflatex clustering_summary_table.tex')
    os.chdir(pwd)
    os.remove(output_tex)
    os.remove(os.path.join(path_to_output_folder, 
                                           'clustering_summary_table.aux'))
    os.remove(os.path.join(path_to_output_folder, 
                                           'clustering_summary_table.log'))
if __name__ == "__main__":
    print 'begin generate pdf table about clustering'
    import argparse
    parser = argparse.ArgumentParser()
    parser.add_argument("path_to_csv")
    parser.add_argument("outputfolder")
    args = vars(parser.parse_args())
    filedir = os.path.abspath(os.path.dirname(__file__))
    output_folder_path_abs = os.path.abspath(args['outputfolder'])
    input_folder_path_abs = os.path.abspath(args['path_to_csv'])
    # copy the user package latex to the folder
    os.system('scp '
    +os.path.abspath(os.path.join(filedir, 'userpackagelatex/booktabs.sty'))+
    ' ' +output_folder_path_abs)
    os.system('scp '
    +os.path.abspath(os.path.join(filedir, 'userpackagelatex/geography.sty'))+
    ' ' +output_folder_path_abs)
    os.system('scp '
    +os.path.abspath(os.path.join(filedir, 'userpackagelatex/pdflscape.sty'))+
    ' ' +output_folder_path_abs)
    save_summary_table_as_pdf(input_folder_path_abs, output_folder_path_abs)
    os.remove(os.path.join(output_folder_path_abs, 'booktabs.sty'))
    os.remove(os.path.join(output_folder_path_abs, 'geography.sty'))
    os.remove(os.path.join(output_folder_path_abs, 'pdflscape.sty'))

Answer 2

一种方法是使用markdown。您可以使用df.to_html()。这将数据框架转换为HTML表。从那里，您可以将生成的HTML放入Markdown文件（.MD）中，并使用软件包将Markdown转换为PDF。https://www.npmjs.com/package/markdown-pdf

这是一个不错的选择吗？