code
----

    # Create the memory dataframe
    memory_df = pd.DataFrame()
    memory_df.astype('int32').dtypes
    temp_df = pd.DataFrame()
    temp_df.astype('int32').dtypes
    print(f"Reading text files into the Memory DF")
    for filename in filelist:
        print(f"Adding filename: {filename}")
        filename = text_path + filename
        temp_df = pd.read_csv(filename, delim_whitespace=True, header=None)
        temp_df.columns = ['Memory']
        temp_df.astype('int32').dtypes
        memory_df = memory_df.append(temp_df)
    memory_df.columns = ['Memory']


---
output
---

***Memory Data Frame:
     Memory
0   1843260
0   7706164
0   7904828
0   7706164
0   7706172
0   7648524
0   7648524
0   7706172
0   7706164
0   7904828
0   7706172
0   7648524
0   7706172
0  16075888
0   7904672
0   7904680
0   7904672
0   7904680
0  16075880
0   7904672
***