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import re
test_1 = re.match('i','python')
print(test_1)
test_2 = re.match('p','python')
print(test_2)
some_text = 'alpha, beta,,,,gamma delta'
test_3 = re.split('[, ]+', some_text)
print('some_text is :',some_text)
print('test_3 is :',test_3)
test_4 = re.split('o','fobar')
print('test_4 is :',test_4)
test_5 = re.split('o','fooobar')
print('test_5 is :',test_5)
test_6 = re.split('o(o)','fooobar')
print('test_6 is :',test_6)
pat = '[a-zA-Z]+'
text = '"Hm...Err -- are you sure?" he said , sounding insecure.'
word = re.findall(pat,text)
print(word)
pat = r'[.?",\-]+'
Symbol = re.findall(pat,text)
print(Symbol)
pat = '{name}'
text = 'Dear {name} ...'
sub_ = re.sub(pat,'ChenYushao',text)
print(sub_)
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