python编程提升1（答案篇）

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python编程提升1（答案篇）

guolongnv · 2022-10-10 · via 博客园 - guolongnv

#!/home/utils/Python/builds/3.9.9-20220110/bin/python3
class Common():
    def __init__(self,name,size=0,parent=None):
        self.name = name
        self.size=size
        self.parent=parent

    def get_full_path(self):
        if self.parent == None:
            return self.name
        return self.parent.get_full_path() + "/" +self.name

    def __str__(self):
        return self.get_full_path()

class File(Common):
    def __init__(self, name,size,parent=None):
        Common.__init__(self,name,size,parent)

    def set_size(self,size):
        self.size = size

    def get_size(self):
        return self.size

    def get_file(self):
        return self.name

class Dir(Common):
    def __init__(self, name,size=0,parent=None):
        Common.__init__(self,name,size,parent)
        self.files={}
        self.dirs={}
        self.size=size

    def get_dir(self):
        return self.name

    def new_file(self,file_name,size=0):
        file=File(file_name,size,self)
        self.files[file_name]=file
        return file

    def new_dir(self,dir_name):
        dir_=Dir(dir_name,parent=self)
        self.dirs[dir_name]=dir_
        return dir_

    def get_size(self):
        for file_name, file in self.files.items():
            self.size+=file.get_size()
        for dir_name, dir in self.dirs.items():
            self.size+=dir.get_size()
        return self.size

#!/home/utils/Python/builds/3.9.9-20220110/bin/python3
class Common:
    def __init__(self, name,size=0):
        self.name = name
        self.size=size

class File(Common):
    def __init__(self, name,size):
        Common.__init__(self,name,size)

    def set_size(self,size):
        self.size = size

    def get_size(self):
        return self.size

    def get_file(self):
        return self.name

class Dir(Common):
    def __init__(self, name):
        Common.__init__(self,name)
        self.files={}
        self.dirs={}
        self.size=0

    def get_dir(self):
        return self.name

    def new_file(self,file_name,size=0):
        file=File(file_name,size)
        self.files[file_name]=file
        return(file)

    def new_dir(self,dir_name):
        dir=Dir(dir_name)
        self.dirs[dir_name]=dir
        return dir

    def get_size(self):
        for file_name, file in self.files.items():
            self.size+=file.get_size()
        for dir_name, dir in self.dirs.items():
            self.size+=dir.get_size()
        return self.size

问题1

Code:

─
#!/home/utils/Python/builds/3.9.9-20220110/bin/python3
class Common:
    def __init__(self, name):
        self.name = name

class File(Common):
    def __init__(self, name):
        Common.__init__(self,name)

    def get_file(self):
        return self.name

class Dir(Common):
    def __init__(self, name):
        Common.__init__(self,name)

self.files={}

self.dirs={}

    def get_dir(self):
        return self.name

Test:

if __name__ == "__main__":
    file_a=File("a")
    print(file_a.get_file())
    dir_b=Dir("b")
    print(dir_b.get_dir())

Output:

a
b

问题2:

Code:

#!/home/utils/Python/builds/3.9.9-20220110/bin/python3
class Common:
    def __init__(self, name):
        self.name = name

class File(Common):
    def __init__(self, name):
        Common.__init__(self,name)

    def get_file(self):
        return self.name

class Dir(Common):
    def __init__(self, name):
        Common.__init__(self,name)
        self.files={}
        self.dirs={}

    def get_dir(self):
        return self.name

    def new_file(self,file_name):
        file=File(file_name)
        self.files[file_name]=file
        return(file)

    def new_dir(self,dir_name):
        dir=Dir(dir_name)
        self.dirs[dir_name]=dir
        return dir

Test:

if __name__ == "__main__":
    dir_b=Dir("b")
    file_a=dir_b.new_file("a")
    print(file_a.get_file())
    dir_c=dir_b.new_dir("c")
    print(dir_c.get_dir())

Output:

a
c

问题:3

Code:

#!/home/utils/Python/builds/3.9.9-20220110/bin/python3
class Common:
    def __init__(self, name,size=0):
        self.name = name
        self.size=size

class File(Common):
    def __init__(self, name,size):
        Common.__init__(self,name,size)

    def set_size(self,size):
        self.size = size

    def get_size(self):
        return self.size

    def get_file(self):
        return self.name

class Dir(Common):
    def __init__(self, name):
        Common.__init__(self,name)
        self.files={}
        self.dirs={}
        self.size=0

    def get_dir(self):
        return self.name

    def new_file(self,file_name,size=0):
        file=File(file_name,size)
        self.files[file_name]=file
        return(file)

    def new_dir(self,dir_name):
        dir=Dir(dir_name)
        self.dirs[dir_name]=dir
        return dir

    def get_size(self):
        for file_name, file in self.files.items():
            self.size+=file.get_size()
        for dir_name, dir in self.dirs.items():
            self.size+=dir.get_size()
        return self.size

Test:

if __name__ == "__main__":
    dir_b=Dir("b")
    file_a=dir_b.new_file("a")
    file_c=dir_b.new_file("c",20)
    dir_d=dir_b.new_dir("d")
    file_e=dir_d.new_file("d",30)
    file_a.set_size(10)
    print(file_a.get_size())
    print(dir_b.get_size())

Output:

问题4:

code:

─
#!/home/utils/Python/builds/3.9.9-20220110/bin/python3
class Common():
    def __init__(self,name,size=0,parent=None):
        self.name = name
        self.size=size
        self.parent=parent

    def get_full_path(self):
        if self.parent == None:
            return self.name
        return self.parent.get_full_path() + "/" +self.name

class File(Common):
    def __init__(self, name,size,parent=None):
        Common.__init__(self,name,size,parent)

    def set_size(self,size):
        self.size = size

    def get_size(self):
        return self.size

    def get_file(self):
        return self.name

class Dir(Common):
    def __init__(self, name,size=0,parent=None):
        Common.__init__(self,name,size,parent)
        self.files={}
        self.dirs={}
        self.size=size

    def get_dir(self):
        return self.name

    def new_file(self,file_name,size=0):
        file=File(file_name,size,self)
        self.files[file_name]=file
        return file

    def new_dir(self,dir_name):
        dir_=Dir(dir_name,parent=self)
        self.dirs[dir_name]=dir_
        return dir_

    def get_size(self):
        for file_name, file in self.files.items():
            self.size+=file.get_size()
        for dir_name, dir in self.dirs.items():
            self.size+=dir.get_size()
        return self.size

test:

if __name__ == "__main__":
    dir_b=Dir("b")
    file_a=dir_b.new_file("a")
    file_c=dir_b.new_file("c",20)
    dir_d=dir_b.new_dir("d")
    file_e=dir_d.new_file("e",30)
    print(file_e.get_full_path())
    print(dir_d.get_full_path())

output:

b/d/e
b/d

问题4:

code:

─
#!/home/utils/Python/builds/3.9.9-20220110/bin/python3
class Common():
    def __init__(self,name,size=0,parent=None):
        self.name = name
        self.size=size
        self.parent=parent

    def get_full_path(self):
        if self.parent == None:
            return self.name
        return self.parent.get_full_path() + "/" +self.name

    def __str__(self):
        return self.get_full_path()

class File(Common):
    def __init__(self, name,size,parent=None):
        Common.__init__(self,name,size,parent)

    def set_size(self,size):
        self.size = size

    def get_size(self):
        return self.size

    def get_file(self):
        return self.name

class Dir(Common):
    def __init__(self, name,size=0,parent=None):
        Common.__init__(self,name,size,parent)
        self.files={}
        self.dirs={}
        self.size=size

    def get_dir(self):
        return self.name

    def new_file(self,file_name,size=0):
        file=File(file_name,size,self)
        self.files[file_name]=file
        return file

    def new_dir(self,dir_name):
        dir_=Dir(dir_name,parent=self)
        self.dirs[dir_name]=dir_
        return dir_

    def get_size(self):
        for file_name, file in self.files.items():
            self.size+=file.get_size()
        for dir_name, dir in self.dirs.items():
            self.size+=dir.get_size()
        return self.size

test:

if __name__ == "__main__":
    dir_b=Dir("b")
    file_a=dir_b.new_file("a")
    file_c=dir_b.new_file("c",20)
    dir_d=dir_b.new_dir("d")
    file_e=dir_d.new_file("e",30)
    print(file_e)
    print(dir_d)

output:

b/d/e
b/d

问题6

code:

class Common():
    def __init__(self,name,size=0,parent=None):
        self.name = name
        self.size=size
        self.parent=parent

    def get_full_path(self):
        if self.parent == None:
            return self.name
        return self.parent.get_full_path() + "/" +self.name

    def __str__(self):
        return self.get_full_path()

class File(Common):
    def __init__(self, name,size,parent=None):
        Common.__init__(self,name,size,parent)

    def set_size(self,size):
        self.size = size

    def get_size(self):
        return self.size

    def get_file(self):
        return self.name

class Dir(Common):
    def __init__(self, name,size=0,parent=None):
        Common.__init__(self,name,size,parent)
        self.files={}
        self.dirs={}
        self.size=size

    def get_dir(self):
        return self.name

    def new_file(self,file_name,size=0):
        file=File(file_name,size,self)
        self.files[file_name]=file
        return file

    def new_dir(self,dir_name):
        dir_=Dir(dir_name,parent=self)
        self.dirs[dir_name]=dir_
        return dir_

    def get_size(self):
        for file_name, file in self.files.items():
            self.size+=file.get_size()
        for dir_name, dir in self.dirs.items():
            self.size+=dir.get_size()
        return self.size

    def get_files_count(self):
        count=0
        for file_name, file in self.files.items():
            count += 1
        for dir_name, dir in self.dirs.items():
            count += dir.get_files_count()
        return count

test:

if __name__ == "__main__":
    dir_b=Dir("b")
    file_a=dir_b.new_file("a")
    file_c=dir_b.new_file("c",20)
    dir_d=dir_b.new_dir("d")
    file_e=dir_d.new_file("e",30)
    print(dir_b.get_files_count())

output:

问题7

code:

    def ls(self):
        files=[]
        dirs=[]
        for file_name, file in self.files.items():
            files.append(file_name)
        for dir_name, dir_ in self.dirs.items():
            dirs.append(dir_name)
        return {"files":files, "dirs":dirs}

test:

if __name__ == "__main__":
    dir_b=Dir("b")
    file_a=dir_b.new_file("a")
    file_c=dir_b.new_file("c",20)
    dir_d=dir_b.new_dir("d")
    file_e=dir_d.new_file("e",30)
    print(dir_b.ls())

output:

{'files': ['a', 'c'], 'dirs': ['d']}

问题8

code:

class File(Common):
...
    def dump(self):
        return {"name": self.name, "size": self.size}

class Dir(Common):
...
    def dump(self):
        files=[]
        dirs=[]
        for file_name, file in self.files.items():
            files.append(file.dump())
        for dir_name, dir_ in self.dirs.items():
            dirs.append(dir_.dump())
        return {"name": self.name, "files": files, "dirs": dirs}

test:

if __name__ == "__main__":
    dir_b=Dir("b")
    file_a=dir_b.new_file("a")
    file_c=dir_b.new_file("c",20)
    dir_d=dir_b.new_dir("d")
    file_e=dir_d.new_file("e",30)
    print(file_e.dump())
    print(dir_b.dump())

output:

{'name': 'e', 'size': 30}
{'name': 'b', 'files': [{'name': 'a', 'size': 0}, {'name': 'c', 'size': 20}], 'dirs': [{'name': 'd', 'files': [{'name': 'e', 'size': 30}], 'dirs': []}]}

问题9:

code:

class Common():
    def __init__(self,name="",size=0,parent=None,info=None):
        self.name=name
        self.size=size
        self.parent=parent

    def get_full_path(self):
        if self.parent == None:
            return self.name
        return self.parent.get_full_path() + "/" +self.name

    def __str__(self):
        return self.get_full_path()

class File(Common):
    def __init__(self,name="",size=0,parent=None,info=None):
        Common.__init__(self,name,size,parent)
        if info != None:
            self._load(info)

    def _load(self,info):
        self.name=info["name"]
        self.size=info["size"]

    def set_size(self,size):
        self.size = size

    def get_size(self):
        return self.size

    def get_file(self):
        return self.name

    def dump(self):
        return {"name": self.name, "size": self.size}

class Dir(Common):
    def __init__(self,name="",size=0,parent=None,info=None):
        Common.__init__(self,name,size,parent,info)
        self.files={}
        self.dirs={}
        self.size=size
        if info != None :
            self._load(info)

    def _load(self, info):
        self.name=info["name"]
        for file_info in info["files"]:
            new_file=File(info=file_info)
            self.files[new_file.name]=new_file

        for dir_info in info["dirs"]:
            new_dir=Dir(info=dir_info)
            self.dirs[new_dir.name]=new_dir

    def get_dir(self):
        return self.name

    def new_file(self,file_name,size=0):
        file=File(file_name,size,self)
        self.files[file_name]=file
        return file

    def new_dir(self,dir_name):
        dir_=Dir(dir_name,parent=self)
        self.dirs[dir_name]=dir_
        return dir_

    def dump(self):
        files=[]
        dirs=[]
        for file_name, file in self.files.items():
            files.append(file.dump())
        for dir_name, dir_ in self.dirs.items():
            dirs.append(dir_.dump())
        return {"name": self.name, "files": files, "dirs": dirs}

test:

if __name__ == "__main__":
    dir_b=Dir("b")
    file_a=dir_b.new_file("a")
    file_c=dir_b.new_file("c",20)
    dir_d=dir_b.new_dir("d")
    file_e=dir_d.new_file("e",30)
    file_e1=File(info=file_e.dump())
    print(file_e.dump())
    print(file_e1)
    print(file_e1.dump())
    print(dir_b.dump())
    dir_b1=Dir(info=dir_b.dump())
    print(dir_b1)
    print(dir_b1.dump())

output:

{'name': 'e', 'size': 30}
e
{'name': 'e', 'size': 30}
{'name': 'b', 'files': [{'name': 'a', 'size': 0}, {'name': 'c', 'size': 20}], 'dirs': [{'name': 'd', 'files': [{'name': 'e', 'size': 30}], 'dirs': []}]}
b
{'name': 'b', 'files': [{'name': 'a', 'size': 0}, {'name': 'c', 'size': 20}], 'dirs': [{'name': 'd', 'files': [{'name': 'e', 'size': 30}], 'dirs': []}]}

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