字符串占位符替换

字符串替换

from string import Template

class PortTemplate(Template):
    delimiter = "@@"


res = PortTemplate('@@{lico_port1}').substitute({'lico_port1':2})
print(res)

 进阶使用（一）

from string import Template

from collections import defaultdict

res = (i for i in range(100))

def zero():
    return next(res)

class PortTemplate(Template):
    delimiter = "@@"

if __name__ == '__main__':
    dd = defaultdict(zero)
    res1 = PortTemplate('@@{lico_port1} @@{lico_port2}').substitute(dd)
    print(res1)
    print(dd.items())

　　

 

进阶使用 （二）

from string import Template

class A(dict):
    def __init__(self):
        self.port_list = []
        self.unused = (i for i in range(100))

    def __getitem__(self, name):
        port = next(self.unused)
        self.port_list.append({name: port})
        return port

class PortTemplate(Template):
    delimiter = "@@"

if __name__ == '__main__':
    a= A()
    res1 = PortTemplate('@@{lico_port1} @@{lico_port2} @@{lico_port3}').substitute(a)
    print(res1)
    print(a.port_list)