如何修复-错误:位置0处的转义符\ u错误 [英] how to fix - error: bad escape \u at position 0

问题描述

你好，我试图在jupyter笔记本中使用ipywidgets导出gmap html，但是遇到以下错误:-错误:位置0处的u转义错误.

Hello I'm trying to export a gmap html using ipywidgets in jupyter notebook but am encountering the following error: - error: bad escape \u at position 0.

我是编程新手，可以使用帮助修复导致此错误发生的原因.如果有任何更简单的方法可以导出html文件，我很乐意更改方法.

I'm new to programing and could use help fixing whatever is causing this error to occur. If there is any easier way to go about exporting the html file I'm happy to change approaches.

谢谢

这是代码段:如果有帮助，我可以添加整个内容.

Here is a snippet of the code: I can add the entire thing if its helpful.

import pandas as pd
import gmaps
from ipywidgets.embed import embed_minimal_html
from ipywidgets import IntSlider
gmaps.configure(api_key='XXXX')
pd.options.mode.chained_assignment = None  # default='warn'


file2 = '005 lat:long.csv'
state2 = pd.read_csv(file2)
state2 = state2.rename(columns={'Address1': 'address', 'City':'city', 
                                'State':'state', 'Zip': 'zip'})

storenumbs = state2['Store'].str.split('#', expand=True)
state2 = state2.join(storenumbs)
state2 = state2.drop(['Store', 0], axis=1)
state2 = state2.rename(columns={1: 'store_#'})
state2['store_#'] = state2['store_#'].astype(int)

fig = gmaps.figure(center=(42.5, -71.4), map_type='TERRAIN', zoom_level=9.8)
scale = 4
one_layer = (gmaps.symbol_layer(low_points_lat_long, fill_color='red', stroke_color='red', scale= scale))
two_layer = (gmaps.symbol_layer(low_med_points_lat_long, fill_color='red', stroke_color='yellow', scale= scale))
three_layer = (gmaps.symbol_layer(med_high_points_lat_long, fill_color='yellow', stroke_color='green', scale= scale))
four_layer = (gmaps.symbol_layer(high_points_lat_long, fill_color='green', stroke_color='green', scale= scale))


fig.add_layer(one_layer)
fig.add_layer(two_layer)
fig.add_layer(three_layer)
fig.add_layer(four_layer)

fig
embed_minimal_html('export.html', views=[fig]

长格式错误提示框

)

KeyError                                  Traceback (most recent call last)
~/miniconda3/lib/python3.7/sre_parse.py in parse_template(source, pattern)
   1020                 try:
-> 1021                     this = chr(ESCAPES[this][1])
   1022                 except KeyError:

KeyError: '\\u'

During handling of the above exception, another exception occurred:

error                                     Traceback (most recent call last)
<ipython-input-7-c096ac365396> in <module>
     20 
     21 slider = IntSlider(value=40)
---> 22 embed_minimal_html('export.html', views=[slider], title='Widgets export')

~/miniconda3/lib/python3.7/site-packages/ipywidgets/embed.py in embed_minimal_html(fp, views, title, template, **kwargs)
    300     {embed_kwargs}
    301     """
--> 302     snippet = embed_snippet(views, **kwargs)
    303 
    304     values = {

~/miniconda3/lib/python3.7/site-packages/ipywidgets/embed.py in embed_snippet(views, drop_defaults, state, indent, embed_url, requirejs, cors)
    266     widget_views = u'\n'.join(
    267         widget_view_template.format(view_spec=escape_script(json.dumps(view_spec)))
--> 268         for view_spec in data['view_specs']
    269     )
    270 

~/miniconda3/lib/python3.7/site-packages/ipywidgets/embed.py in <genexpr>(.0)
    266     widget_views = u'\n'.join(
    267         widget_view_template.format(view_spec=escape_script(json.dumps(view_spec)))
--> 268         for view_spec in data['view_specs']
    269     )
    270 

~/miniconda3/lib/python3.7/site-packages/ipywidgets/embed.py in escape_script(s)
    239     involving `<` is readable.
    240     """
--> 241     return script_escape_re.sub(r'\u003c\1', s)
    242 
    243 @doc_subst(_doc_snippets)

~/miniconda3/lib/python3.7/re.py in _subx(pattern, template)
    307 def _subx(pattern, template):
    308     # internal: Pattern.sub/subn implementation helper
--> 309     template = _compile_repl(template, pattern)
    310     if not template[0] and len(template[1]) == 1:
    311         # literal replacement

~/miniconda3/lib/python3.7/re.py in _compile_repl(repl, pattern)
    298 def _compile_repl(repl, pattern):
    299     # internal: compile replacement pattern
--> 300     return sre_parse.parse_template(repl, pattern)
    301 
    302 def _expand(pattern, match, template):

~/miniconda3/lib/python3.7/sre_parse.py in parse_template(source, pattern)
   1022                 except KeyError:
   1023                     if c in ASCIILETTERS:
-> 1024                         raise s.error('bad escape %s' % this, len(this))
   1025                 lappend(this)
   1026         else:

error: bad escape \u at position 0 

推荐答案

这是Python 3.7中的错误，也是Python 3.6的问题(但Python 2.7可以).

This is an error in Python 3.7, and an issue with Python 3.6 (but it is OK with Python 2.7).

如果在re.sub函数中使用原始字符串(以"r"作为前缀)进行替换，则\u被转义.例如，r'\u003c\1'类似于'\\u003c\\1':这是字符串'\u'，后跟'003c'和\1.

If you use a raw string (prefixed by "r") for the replacement in re.sub function, then the \u is escaped. For instance, r'\u003c\1' is like '\\u003c\\1': this is a string '\u', followed by '003c' and \1.

解决方案是写:

return script_escape_re.sub('\u003c\\1', s)

引用文档:

版本3.7 中已更改: repl 中由'\'和ASCII字母组成的未知转义符现在是错误.

Changed in version 3.7: Unknown escapes in repl consisting of '\' and an ASCII letter now are errors.

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