python报表自动化系列 - 为pandas.DataFrame制作自然数索引（更改索引为从1开始的自然数）

import pandas as pd
import numpy as np
def DataFrame_Add_num_index(df):
  '''为任意大小的Dataframe结构变量添加从1开始的数字索引'''
    A = np.array(df)         #先要知道这个DataFrame的大小，即其形状
    A = A.tolist() 
    shape = df.shape 
    r = shape[0]
    c = shape[1]
    c_list = []
    r_list = []
    a = 1
    b = 1
    while a <= c:
        c_list.append(a)
        a = a+1
    while b <= r:
        r_list.append(b)
        b = b+1
    df = pd.DataFrame(A,columns = c_list, index = r_list)
    return df