In [1]:

    

import re


    

In [2]:

    

m = re.match(r'\w+', 'あいう漢字ＡＢＣ１２３')
print(m)


    

    




<re.Match object; span=(0, 11), match='あいう漢字ＡＢＣ１２３'>

In [3]:

    

m = re.match('[a-zA-Z0-9_]+', 'あいう漢字ＡＢＣ１２３')
print(m)


    

    




None

In [4]:

    

m = re.match(r'\w+', 'あいう漢字ＡＢＣ１２３', flags=re.ASCII)
print(m)


    

    




None

In [5]:

    

m = re.match(r'(?a)\w+', 'あいう漢字ＡＢＣ１２３')
print(m)


    

    




None

In [6]:

    

p = re.compile(r'\w+', flags=re.ASCII)
print(p)


    

    




re.compile('\\w+', re.ASCII)

In [7]:

    

print(p.match('あいう漢字ＡＢＣ１２３'))


    

    




None

In [8]:

    

p = re.compile(r'(?a)\w+')
print(p)


    

    




re.compile('(?a)\\w+', re.ASCII)

In [9]:

    

print(p.match('あいう漢字ＡＢＣ１２３'))


    

    




None

In [10]:

    

print(re.ASCII is re.A)


    

    




True

In [11]:

    

m = re.match(r'\W+', 'あいう漢字ＡＢＣ１２３')
print(m)


    

    




None

In [12]:

    

m = re.match(r'\W+', 'あいう漢字ＡＢＣ１２３', flags=re.ASCII)
print(m)


    

    




<re.Match object; span=(0, 11), match='あいう漢字ＡＢＣ１２３'>

In [13]:

    

m = re.match(r'\d+', '123')
print(m)


    

    




<re.Match object; span=(0, 3), match='123'>

In [14]:

    

m = re.match(r'\d+', '１２３')
print(m)


    

    




<re.Match object; span=(0, 3), match='１２３'>

In [15]:

    

m = re.match(r'\d+', '123', flags=re.ASCII)
print(m)


    

    




<re.Match object; span=(0, 3), match='123'>

In [16]:

    

m = re.match(r'\d+', '１２３', flags=re.ASCII)
print(m)


    

    




None

In [17]:

    

m = re.match(r'\s+', '　')  # 全角スペース
print(m)


    

    




<re.Match object; span=(0, 1), match='\u3000'>

In [18]:

    

m = re.match(r'\s+', '　', flags=re.ASCII)
print(m)


    

    




None

In [19]:

    

m = re.match('[a-zA-Z]+', 'abcABC')
print(m)


    

    




<re.Match object; span=(0, 6), match='abcABC'>

In [20]:

    

m = re.match('[a-z]+', 'abcABC', flags=re.IGNORECASE)
print(m)


    

    




<re.Match object; span=(0, 6), match='abcABC'>

In [21]:

    

m = re.match('[A-Z]+', 'abcABC', flags=re.IGNORECASE)
print(m)


    

    




<re.Match object; span=(0, 6), match='abcABC'>

In [22]:

    

s = '''aaa-xxx
bbb-yyy
ccc-zzz'''


    

In [23]:

    

print(s)


    

    




aaa-xxx
bbb-yyy
ccc-zzz

In [24]:

    

result = re.findall('[a-z]+', s)
print(result)


    

    




['aaa', 'xxx', 'bbb', 'yyy', 'ccc', 'zzz']

In [25]:

    

result = re.findall('^[a-z]+', s)
print(result)


    

    




['aaa']

In [26]:

    

result = re.findall('^[a-z]+', s, flags=re.MULTILINE)
print(result)


    

    




['aaa', 'bbb', 'ccc']

In [27]:

    

result = re.findall('[a-z]+$', s)
print(result)


    

    




['zzz']

In [28]:

    

result = re.findall('[a-z]+$', s, flags=re.MULTILINE)
print(result)


    

    




['xxx', 'yyy', 'zzz']

In [29]:

    

s = '''aaa-xxx
あああ-んんん
bbb-zzz'''


    

In [30]:

    

print(s)


    

    




aaa-xxx
あああ-んんん
bbb-zzz

In [31]:

    

result = re.findall(r'^\w+', s, flags=re.M)
print(result)


    

    




['aaa', 'あああ', 'bbb']

In [32]:

    

result = re.findall(r'^\w+', s, flags=re.M | re.A)
print(result)


    

    




['aaa', 'bbb']

In [33]:

    

result = re.findall(r'(?am)^\w+', s)
print(result)


    

    




['aaa', 'bbb']