Question

def read_file():
    with open("bla.csv", "r") as Blabla:
        reader = csv.reader(BlaBla)

        for column in reader:
            one = column[1]
            two = column[2]
            three = column[3]
            four = column[4]

            bla_line.append([one, two, three, four])

count, c = 50, 1
while c < count:
    read_file()

    c = c + 1

在循环时如何逐行读取文件？每c一行。

c = 0 = read line 0
c = 1 = read line 1
c = 2 = read line 2

以此类推...

islice，pandas等，到目前为止，对我来说还没有解决。

我需要这个构造完全一样，因为这里没有列出其他功能和以后的操作。

到目前为止append操作正常。这里的问题是像我描述的那样遍历文件。

Answer 1

希望这将逐行读取csv文件

with open("bla.csv") as f:
    lis = [line.split() for line in f]        # create a list of lists
    for i, x in enumerate(lis):              #print the list items 
        print "line{0} = {1}".format(i, x))

Answer 2

此解决方案是逐行读取csv文件，并返回代表原始csv文件的列表列表。

奖金-如果需要，您可以忽略csv标头：）

def read_csv(path: str, ignore_headers: bool = False):
    with open(path, 'r') as csv:
        res = []
        for line_number, line in enumerate(csv.readlines()):
            if ignore_headers and line_number == 0:
                continue
            else:
                res.append(line.strip().split(','))

    return res


if __name__ == '__main__':
    csv_content = '''first_name,last_name,age
    John,Harris,23
    Omar,Ahmed,19'''
    with open('temp.csv', 'w') as _file:
        for line in csv_content:
            _file.write(line)
    csv = read_csv('temp.csv')
    print(csv)
    csv = read_csv('temp.csv', ignore_headers=True)
    print(csv)

希望它会有所帮助！

Python逐行循环读取CSV文件

2 个答案: