要只读取csv文件的第一行，请在读取器对象上使用next()。

with open('some.csv', newline='') as f:
  reader = csv.reader(f)
  row1 = next(reader)  # gets the first line
  # now do something here 
  # if first row is the header, then you can do one more next() to get the next row:
  # row2 = next(f)

或：

with open('some.csv', newline='') as f:
  reader = csv.reader(f)
  for row in reader:
    # do something here with `row`
    break

您可以只得到第一行，例如：

with open('some.csv', newline='') as f:
  csv_reader = csv.reader(f)
  csv_headings = next(csv_reader)
  first_line = next(csv_reader)

您可以使用Pandas库从庞大的数据集中读取前几行。

import pandas as pd

data = pd.read_csv("names.csv", nrows=1)

您可以在nrows参数中指定要读取的行数。

仅供参考，可以在获取第一行后使用for循环来获取文件的其余部分：

with open('file.csv', newline='') as f:
    reader = csv.reader(f)
    row1 = next(reader)  # gets the first line
    for row in reader:
        print(row)       # prints rows 2 and onward

在Python文档中：
虽然该模块不直接支持解析字符串，但可以很容易地做到：

import csv
for row in csv.reader(['one,two,three']):
    print row

只需将字符串数据放入一个单例列表中。

获取csv文件中任意行的简单方法

import csv
csvfile = open('some.csv','rb')
csvFileArray = []
for row in csv.reader(csvfile, delimiter = '.'):
    csvFileArray.append(row)
print(csvFileArray[0])

打印一系列行，在本例中为从第4行到第7行

import csv

with open('california_housing_test.csv') as csv_file:
    data = csv.reader(csv_file)
    for row in list(data)[4:7]:
        print(row)

我认为最简单的方法就是最好的方法，在这种情况下（以及在大多数其他情况下）是不使用外部库（panda）或模块（csv）的方法。

""" no need to give any mode, keep it simple """
with open('some.csv') as f:
    """ store in a variable to be used later """
    my_line = f.nextline()
    """ do what you like with 'my_line' now """