[英]remove first 4 lines in multiple csv files python
我知道如何删除CSV文件中的行,但是要查看删除多个CSV文件中的多行。
这是我的代码:
import csv
import os
import glob
myfiles = glob.glob('*.csv',recursive=False)
with open(myfiles, 'r') as fin:
data = fin.read().splitlines(True)
with open(myfiles, 'w') as fout:
fout.writelines(data[5:])
我想实现以下目的:1)遍历当前目录。 2)删除CSV文件中的前4行并保存。
这个答案看起来很有用 以下是处理多个文件的轻微调整:
import glob
myfiles = glob.glob('*.csv')
for file in myfiles:
lines = open(file).readlines()
open(file, 'w').writelines(lines[3:])
如果你想使用python,你可以这样做。
import csv
import os
def read_csv(inputfile, outputfile):
try:
with open(inputfile, 'r') as csvfile:
file = csv.reader(csvfile, delimiter='|', lineterminator = '\n')
for i, line in enumerate(file):
if i > 3:
write_csv(line,outputfile)
except IOError:
print "IOError in ", inputfile
def write_csv(w_list, outputfile):
with open(outputfile, 'a') as f:
writer = csv.writer(f, delimiter = '|', lineterminator = '\n')
writer.writerows(w_list)
def main():
indir = 'path to dir with csv'
for root, dirs, filenames in os.walk(indir):
for f in filenames:
filename = os.path.join(root , f)
if '.csv' in filename:
read_csv(filename, outputfile='output' +filename)
if __name__=="__main__":
main()
或者您可以使用:
tail -n +4 original.csv > original-4-top-lines.csv
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