VARSTATE-это пакет Python для управления данными ReactJS.
- Создать, обновить, удалить состояние
- Создать, обновить, Удалить события
- Просто и быстро. (Легко использовать)
- Быстрая производительность
Просто, просто введите PIP установка -u Varstate
Анкет Или вы можете использовать с исходным кодом.
from varstate import State # Importing State state = State() get, update = state.create(-1) # Now we created a state that has value -1. # i will use -1 for this document. You can put whatever you want. # Now we have two functions. # get() for getting value, and # update(any) to update our value.
# We can change the value with update() function. # function takes one argument, the argument will be new value. print(get()) # Print current value update(1) # Updating the value to 1 print(get()) # Print updated value
# If you finished your works with state, you can delete from the memory. # just call the.delete()! state.delete() # Deleted the events and value.
# You can use events for run some functions. # Example; from varstate import State # Importing State state = State() # Before calling create, let's create the events. state.before_create(lambda value: print(f"Creating state with {value}, type: {type(value)}")) # before_create runs before state creates. state.after_create(lambda value: print(f"Created state with {value}, type: {type(value)}")) # after_create runs after state created. get, update = state.create(-1) # When you run the program, it will print: # Creating state with -1, type:# Created state with -1, type:
# This event runs when started to create a state. # Takes one argument, the value that will be create. from varstate import State state = State() state.before_create(lambda value: print(f"Creating state with {value}, type: {type(value)}")) # NOTE: also you can use function like this; def before_create_function(value): print(f"Creating state with {value}, type: {type(value)}") state.before_create(before_create_function) # Creating the state get, update = state.create(-1)
# This event runs when created a state. # Takes one argument, the value that created. from varstate import State state = State() state.after_create(lambda value: print(f"Created state with {value}, type: {type(value)}")) # Creating the state get, update = state.create(-1)
# This event runs when started to update the data. # Takes two argument, first one is the value, second one is the new value will update. from varstate import State state = State() state.before_update(lambda now, future: print(now, future)) # Creating the state get, update = state.create(-1) print(get()) update(1) print(get())
# This event runs when updated the data. # Takes two argument, first one is the updated value, second one is the old value. from varstate import State state = State() state.after_create(lambda now, old: print(f"{old} updated to {now}.")) # Creating the state get, update = state.create(-1) print(get()) update(1) print(get())
# This event checks should data updated. # Takes two argument, first one is the value, second one is the new value will update. # Also function should return a boolean. from varstate import State state = State() state.should_update(lambda now, future: future % 2 == 0) # Now it will only update if new data is even. # Creating the state get, update = state.create(-1) print(get()) update(1) # Not updating print(get()) update(2) # Updating print(get())
# This event runs before delete function runs. from varstate import State state = State() state.before_delete(lambda: print("please don't delete me ;(")) # Creating the state get, update = state.create(-1) print(get()) update(1) print(get()) state.delete()
Оригинал: “https://dev.to/5elenay/varstate-python-package-for-state-management-3dn5”