我想读取csv文件中的数据,并做一些格式。但我忘记了在将数据重新格式化为numpy数组后如何删除“”、“”。我以前看到过在一行中使用eval()
的技巧。但我现在找不到。你知道吗
My csv file data looks like:
6,1 2 3 4 5 6。。。2300 2301 2302 2303 2304\n
。。。你知道吗
1,1 2 3 4 5 6。。。2300 2301 2302 2303 2304\n
from load_data import load
import numpy as np
import matplotlib.pyplot as plt
with open('fer2013.csv') as f:
f.readline()
line = f.readline()
line = line.replace("\n","")
line = line.split(",")
X = np.array(line[1].split(" "))
X.reshape((48,48))
print(X)
输出为:
[['70' '80' '82' ... '52' '43' '41']
['65' '61' '58' ... '56' '52' '44']
['50' '43' '54' ... '49' '56' '47']
...
['91' '65' '42' ... '72' '56' '43']
['77' '82' '79' ... '105' '70' '46']
['77' '72' '84' ... '106' '109' '82']]
但我想要的是:
[[70 80 82 ... 52 43 41]
...
[77 72 84 ... 106 109 82]]
我见过一些类似这种格式的技巧(但实际上不是这样):
X = np.array(for I in eval(line[1].split(" ")))
使用
X = np.array(line[1].split(" ")).astype(np.int)
好吧,我找到答案了。你知道吗
X = np.array(list(map(eval,line[1].split(" "))))
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