博客

1.基本的读取文件的方式

import csv
csv_reader=csv.reader(open('taxi.csv',encoding='utf-8'))
for row in csv_reader:
    print(row)
#taxi.csv最好放在同一目录下

2.读取文件中的某一列以及多列

import csv
with open('taxi1.csv',encoding='utf-8') as csvfile:
    reader=csv.reader(csvfile)
    column=[row[2] for row in reader]
    print(column)


####方法2
data_x= pd.read_csv(filepath_or_buffer = 'taxi1.csv', sep = ',')["lo"].values
data_y= pd.read_csv(filepath_or_buffer = 'taxi1.csv', sep = ',')["la"].values

3.读取文件的某一行

import csv
with open('taxi1.csv',encoding='utf-8') as csvfile:
    reader=csv.reader(csvfile)
    for i,rows in enumerate(reader):
        if i==0:
            row=rows
    print(row)
###
['id', 'dest_no', 'lo', 'la', 'gps_time', 'status', 'speed', 'vehicle_type', 'taxi_no_color', 'dir', 'create_time']

4.读取文件的行数

import csv
a=open("taxi1.csv","r")
b=len(a.readline())
print(b)