[英]Finding and replacing bad characters in pandas dataframe
我在試圖擺脫熊貓數據框中的壞字符時陷入困境。 這是一個自動化腳本,用於處理需要保存在 cp1252 中的傳入數據,我希望能夠通過解析錯誤來即時處理任何有問題的字符。 我不在乎它們被替換成什么。 我已經嘗試過一百萬種變化,但一無所獲(這是 python 3 pandas 25)
while True:
try:
print('saving')
data.to_csv('total.csv', index=False, quoting=csv.QUOTE_ALL, encoding='cp1252')
break
except UnicodeEncodeError as e:
print(e)
badchar = re.search(r"character (.+?) in", str(e)).group(1)
print('Found bad character, removing. . . ')
uchar = u"{}".format(badchar)
print(uchar)
data = data.replace(uchar.encode('utf-8'), '')
返回:
saving
'charmap' codec can't encode character '\u2264' in position 399: character maps to <undefined>
Found bad character, removing. . .
'\u2264'
saving
'charmap' codec can't encode character '\u2264' in position 399: character maps to <undefined>
Found bad character, removing. . .
'\u2264'
saving
'charmap' codec can't encode character '\u2264' in position 399: character maps to <undefined>
Found bad character, removing. . .
'\u2264'
saving
我嘗試了很多變體:
data = data.replace(uchar, '')
data = data.replace(uchar.encode('utf-8').decode('utf-8'), '')
等等。 .
我也試過 u'\\2264', u'u\\2264'
我在數據框中也找不到這個。 這不返回任何內容:
for col in data:
if sum(data[col].astype(str).str.contains(u'\2264')) > 0:
print(col)
任何幫助將不勝感激謝謝!
您必須使用正則表達式替換功能: https : //pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.replace.html
df.replace(to_replace=r'^ba.$', value='new', regex=True)
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.