python导入csv文件中特定列-如何使用标头完整的python导入csv文件 其中第一列为非数字...

Python csv模块按行处理数据，这是查看此类数据的常用方法。 您似乎想要按列的方法。 这是一种方法。

假设您的文件名为myclone.csv并且包含

workers,constant,age

w0,7.334,-1.406

w1,5.235,-4.936

w2,3.2225,-1.478

w3,0,0

此代码应该给您一个或两个想法：

>>> import csv

>>> f = open("myclone.csv", "rb")

>>> reader = csv.reader(f)

>>> headers = next(reader, None)

>>> headers

["workers", "constant", "age"]

>>> column = {}

>>> for h in headers:

... column[h] = []

...

>>> column

{"workers": [], "constant": [], "age": []}

>>> for row in reader:

... for h, v in zip(headers, row):

... column[h].append(v)

...

>>> column

{"workers": ["w0", "w1", "w2", "w3"], "constant": ["7.334", "5.235", "3.2225", "0"], "age": ["-1.406", "-4.936", "-1.478", "0"]}

>>> column["workers"]

["w0", "w1", "w2", "w3"]

>>> column["constant"]

["7.334", "5.235", "3.2225", "0"]

>>> column["age"]

["-1.406", "-4.936", "-1.478", "0"]

>>>

要将数值放入浮点数，请添加此内容

converters = [str.strip] + [float] * (len(headers) - 1)

提前做

for h, v, conv in zip(headers, row, converters):

column[h].append(conv(v))

而不是上面类似的两行。