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First solution in Clear category for Text Editor by sawako.oono
class Text:
def __init__(self):
self.text=""
self.font=None
def write(self,text):
self.text+=text
def set_font(self,fontname):
self.font=fontname
def show(self):
if self.font==None:
return self.text
else:
return "[{}]{}[{}]".format(self.font,self.text,self.font)
def restore(self,restored):
self.text=restored[0]
self.font=restored[1]
class SavedText:
def __init__(self):
self.storage=[]
def save_text(self,Text):
self.storage.append((Text.text,Text.font))
def get_version(self,version):
return self.storage[version]
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
text = Text()
saver = SavedText()
text.write("At the very beginning ")
saver.save_text(text)
text.set_font("Arial")
saver.save_text(text)
text.write("there was nothing.")
assert text.show() == "[Arial]At the very beginning there was nothing.[Arial]"
text.restore(saver.get_version(0))
assert text.show() == "At the very beginning "
print("Coding complete? Let's try tests!")
June 11, 2021
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