import string print(string.ascii_lowercase) print(string.ascii_uppercase) print(string.ascii_letters) print(string.digits) print(string.hexdigits) print(string.octdigits) print(string.punctuation) print(string.printable)
abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789 0123456789abcdefABCDEF 01234567 !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&'()*+,- ./:;<=>?@[\]^_`{|}~
import string values = {'var': 'foo'} t = string.Template(""" Variable : $var Escape : $$ Variable in text: ${var}iable """) print('TEMPLATE:', t.substitute(values)) s = """ Variable : %(var)s Escape : %% Variable in text: %(var)siable """ print('INTERPOLATION:', s % values) s = """ Variable : {var} Escape : {{}} Variable in text: {var}iable """ print('FORMAT:', s.format(**values))
TEMPLATE: Variable : foo Escape : $ Variable in text: fooiable INTERPOLATION: Variable : foo Escape : % Variable in text: fooiable FORMAT: Variable : foo Escape : {}
import string class MyTemplate(string.Template): delimiter = '%' idpattern = '[a-z]+_[a-z]+' template_text = ''' Delimiter : %% Replaced : %with_underscore Igonred : %notunderscored ''' d = { 'with_underscore': 'replaced', 'notunderscored': 'not replaced', } t = MyTemplate(template_text) print('Modified ID pattern:') print(t.safe_substitute(d))
$ python string_template_advanced.py Modified ID pattern: Delimiter : % Replaced : replaced Igonred : %notunderscored
为什么notunderscored没有被替换呢?原因是我们在类定义的时候,idpattern里指定要出现下划线'_', 而该变量名并没有下划线,故替代不了。
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