python基础教程之csv文件的写入与读取

import csv

person = [('xxx', 18, 193), ('yyy', 18, 182), ('zzz', 19, 185)]
# 表头
header = ['name', 'age', 'height']

with open('person.csv', 'w', encoding='utf-8') as file_obj:
    # 1:创建writer对象
    writer = csv.writer(file_obj)
    # 2:写表头
    writer.writerow(header)
    # 3:遍历列表，将每一行的数据写入csv
    for p in person:
        writer.writerow(p)

import csv

# 数据
person = [('xxx', 18, 193), ('yyy', 18, 182), ('zzz', 19, 185)]
# 表头
header = ['name', 'age', 'height']

with open('person.csv', 'w', encoding='utf-8', newline='') as file_obj:
    # 创建对象
    writer = csv.writer(file_obj)
    # 写表头
    writer.writerow(header)
    # 遍历，将每一行的数据写入csv
    for p in person:
        writer.writerow(p)

import csv

# 数据
person = [('xxx', 18, 193), ('yyy', 18, 182), ('zzz', 19, 185)]
# 表头
header = ['name', 'age', 'height']

with open('person.csv', 'w', encoding='utf-8', newline='') as file_obj:
    # 创建对象
    writer = csv.writer(file_obj)
    # 写表头
    writer.writerow(header)
    # 3.写入数据(一次性写入多行)
    writer.writerows(person)

import csv

# 数据
person = [
    {'name': 'xxx', 'age': 18, 'height': 193},
    {'name': 'yyy', 'age': 18, 'height': 182},
    {'name': 'zzz', 'age': 19, 'height': 185},
]
# 表头
header = ['name', 'age', 'height']

with open('person.csv', 'w', encoding='utf-8', newline='') as file_obj:
    # 1.创建DicetWriter对象
    dictWriter = csv.DictWriter(file_obj, header)
    # 2.写表头
    dictWriter.writeheader()
    # 3.写入数据(一次性写入多行)
    dictWriter.writerows(person)

import csv

with open('person.csv', 'r', encoding='utf-8') as file_obj:
    # 1.创建reader对象
    reader = csv.reader(file_obj)
    print(reader)

import csv

with open('person.csv', 'r', encoding='utf-8') as file_obj:
    # 1.创建reader对象
    reader = csv.reader(file_obj)
    # 2.遍历进行读取数据
    for r in reader:
        print(r)

print(r[0])

import csv

with open('person.csv', 'r', encoding='utf-8') as file_obj:
    # 1.创建reader对象
    dictReader = csv.DictReader(file_obj)
    # 2.遍历进行读取数据
    for r in dictReader:
        print(r)

print(r['name'])