fluentpython · ramalho · Mar 20, 2019 · Mar 20, 2019
diff --git a/03-dict-set/index.py b/03-dict-set/index.py
@@ -8,7 +8,7 @@
 import sys
 import re
 
-WORD_RE = re.compile('\w+')
+WORD_RE = re.compile(r'\w+')
 
 index = {}
 with open(sys.argv[1], encoding='utf-8') as fp:

diff --git a/03-dict-set/index0.py b/03-dict-set/index0.py
@@ -8,7 +8,7 @@
 import sys
 import re
 
-WORD_RE = re.compile('\w+')
+WORD_RE = re.compile(r'\w+')
 
 index = {}
 with open(sys.argv[1], encoding='utf-8') as fp:

diff --git a/03-dict-set/index_default.py b/03-dict-set/index_default.py
@@ -9,7 +9,7 @@
 import re
 import collections
 
-WORD_RE = re.compile('\w+')
+WORD_RE = re.compile(r'\w+')
 
 index = collections.defaultdict(list)     # <1>
 with open(sys.argv[1], encoding='utf-8') as fp:

diff --git a/14-it-generator/sentence.py b/14-it-generator/sentence.py
@@ -5,7 +5,7 @@
 import re
 import reprlib
 
-RE_WORD = re.compile('\w+')
+RE_WORD = re.compile(r'\w+')
 
 
 class Sentence:

diff --git a/14-it-generator/sentence_gen.py b/14-it-generator/sentence_gen.py
@@ -5,7 +5,7 @@
 import re
 import reprlib
 
-RE_WORD = re.compile('\w+')
+RE_WORD = re.compile(r'\w+')
 
 
 class Sentence:

diff --git a/14-it-generator/sentence_gen2.py b/14-it-generator/sentence_gen2.py
@@ -5,7 +5,7 @@
 import re
 import reprlib
 
-RE_WORD = re.compile('\w+')
+RE_WORD = re.compile(r'\w+')
 
 
 class Sentence:

diff --git a/14-it-generator/sentence_genexp.py b/14-it-generator/sentence_genexp.py
@@ -6,7 +6,7 @@
 import re
 import reprlib
 
-RE_WORD = re.compile('\w+')
+RE_WORD = re.compile(r'\w+')
 
 
 class Sentence:

diff --git a/14-it-generator/sentence_iter.py b/14-it-generator/sentence_iter.py
@@ -9,7 +9,7 @@
 import re
 import reprlib
 
-RE_WORD = re.compile('\w+')
+RE_WORD = re.compile(r'\w+')
 
 
 class Sentence:

diff --git a/14-it-generator/sentence_iter2.py b/14-it-generator/sentence_iter2.py
@@ -8,7 +8,7 @@
 import re
 import reprlib
 
-RE_WORD = re.compile('\w+')
+RE_WORD = re.compile(r'\w+')
 
 
 class Sentence:

diff --git a/18-asyncio-py3.7/charfinder/charfinder.py b/18-asyncio-py3.7/charfinder/charfinder.py
@@ -64,9 +64,9 @@
 import functools
 from collections import namedtuple
 
-RE_WORD = re.compile('\w+')
+RE_WORD = re.compile(r'\w+')
 RE_UNICODE_NAME = re.compile('^[A-Z0-9 -]+$')
-RE_CODEPOINT = re.compile('U\+([0-9A-F]{4,6})')
+RE_CODEPOINT = re.compile(r'U\+([0-9A-F]{4,6})')
 
 INDEX_NAME = 'charfinder_index.pickle'
 MINIMUM_SAVE_LEN = 10000

diff --git a/18-asyncio/charfinder/charfinder.py b/18-asyncio/charfinder/charfinder.py
@@ -64,7 +64,7 @@
 import functools
 from collections import namedtuple
 
-RE_WORD = re.compile('\w+')
+RE_WORD = re.compile(r'\w+')
 RE_UNICODE_NAME = re.compile('^[A-Z0-9 -]+$')
 RE_CODEPOINT = re.compile('U\+([0-9A-F]{4,6})')
 

diff --git a/attic/concurrency/charfinder/charfinder.py b/attic/concurrency/charfinder/charfinder.py
@@ -63,9 +63,9 @@
 import itertools
 from collections import namedtuple
 
-RE_WORD = re.compile('\w+')
+RE_WORD = re.compile(r'\w+')
 RE_UNICODE_NAME = re.compile('^[A-Z0-9 -]+$')
-RE_CODEPOINT = re.compile('U\+([0-9A-F]{4,6})')
+RE_CODEPOINT = re.compile(r'U\+([0-9A-F]{4,6})')
 
 INDEX_NAME = 'charfinder_index.pickle'
 MINIMUM_SAVE_LEN = 10000

diff --git a/attic/dicts/index_alex.py b/attic/dicts/index_alex.py
@@ -8,7 +8,7 @@
 import sys
 import re
 
-NONWORD_RE = re.compile('\W+')
+NONWORD_RE = re.compile(r'\W+')
 
 idx = {}
 with open(sys.argv[1], encoding='utf-8') as fp:

diff --git a/attic/sequences/sentence_slice.py b/attic/sequences/sentence_slice.py
@@ -6,9 +6,9 @@
 import reprlib
 
 
-RE_TOKEN = re.compile('\w+|\s+|[^\w\s]+')
+RE_TOKEN = re.compile(r'\w+|\s+|[^\w\s]+')
 RE_WORD = re.compile('\w+')
-RE_PUNCTUATION = re.compile('[^\w\s]+')
+RE_PUNCTUATION = re.compile(r'[^\w\s]+')
 
 
 class SentenceSlice: