摘要：
https://stackoverflow.com/questions/11707586/python-pandas-how-to-widen-output-display-to-see-more-columns 阅读全文
摘要：
num_col = 0; with open('xxx/xxx.xxx','rb') as fi: while(fi.readline() !=''): num_col = num_col + 1; 阅读全文