Fix more escape sequences

IPython/core/completer.py

@@ -1592,7 +1592,7 b' class IPCompleter(Completer):'
             $
             '''
             regexps = self.__dict_key_regexps = {
-                False: re.compile(dict_key_re_fmt % '''
+                False: re.compile(dict_key_re_fmt % r'''
                                   # identifiers separated by .
                                   (?!\d)\w+
                                   (?:\.(?!\d)\w+)*

IPython/core/inputsplitter.py

@@ -65,7 +65,7 b" ini_spaces_re = re.compile(r'^([ \\t\\r\\f\\v]+)')"
 
 # regexp to match pure comment lines so we don't accidentally insert 'if 1:'
 # before pure comments
-comment_line_re = re.compile('^\s*\#')
+comment_line_re = re.compile(r'^\s*\#')
 
 
 def num_ini_spaces(s):

IPython/core/inputtransformer.py

@@ -171,7 +171,7 b' class assemble_python_lines(TokenInputTransformer):'
 
 @CoroutineInputTransformer.wrap
 def assemble_logical_lines():
-    """Join lines following explicit line continuations (\)"""
+    r"""Join lines following explicit line continuations (\)"""
     line = ''
     while True:
         line = (yield line)
@@ -361,7 +361,7 b' def cellmagic(end_on_blank_line=False):'
     reset (sent None).
     """
     tpl = 'get_ipython().run_cell_magic(%r, %r, %r)'
-    cellmagic_help_re = re.compile('%%\w+\?')
+    cellmagic_help_re = re.compile(r'%%\w+\?')
     line = ''
     while True:
         line = (yield line)

IPython/core/magics/config.py

@@ -24,7 +24,7 b' from logging import error'
 # Magic implementation classes
 #-----------------------------------------------------------------------------
 
-reg = re.compile('^\w+\.\w+$')
+reg = re.compile(r'^\w+\.\w+$')
 @magics_class
 class ConfigMagics(Magics):
 

IPython/core/splitinput.py

@@ -41,7 +41,7 b' from IPython.utils.encoding import get_stream_enc'
 # ! and !! trigger if they are first char(s) *or* follow an indent
 # ? triggers as first or last char.
 
-line_split = re.compile("""
+line_split = re.compile(r"""
              ^(\s*)               # any leading space
              ([,;/%]|!!?|\?\??)?  # escape character or characters
              \s*(%{0,2}[\w\.\*]*)     # function/method, possibly with leading %
@@ -68,7 +68,7 b' def split_user_input(line, pattern=None):'
         except ValueError:
             # print "split failed for line '%s'" % line
             ifun, the_rest = line, u''
-        pre = re.match('^(\s*)(.*)',line).groups()[0]
+        pre = re.match(r'^(\s*)(.*)',line).groups()[0]
         esc = ""
     else:
         pre, esc, ifun, the_rest = match.groups()

IPython/utils/tokenize2.py

@@ -47,7 +47,7 b' from token import *'
 from codecs import lookup, BOM_UTF8
 import collections
 from io import TextIOWrapper
-cookie_re = re.compile("coding[:=]\s*([-\w.]+)")
+cookie_re = re.compile(r"coding[:=]\s*([-\w.]+)")
 
 import token
 __all__ = token.__all__ + ["COMMENT", "tokenize", "detect_encoding",