Oops, your decorator ate the return value from the function.Because the do_twice_wrapper() doesn’t explicitly return a value, the call return_greeting("Adam") ends up returning None.To fix this, you need to make sure the wrapper function returns the return value of the decorated function...
For example, say that you need a generator function that takes a list of numbers and returns an iterator that yields square values from the original data. In this case, you can do something like this:Python >>> def squares_of(values): ... for value in values: ... yield value ...
在这动荡的日子里,也希望写点东西让自己静一静。恰好前段时间用python做了一点时间序列方面的东西,有一丁点心得体会想和大家分享下。在此也要特别感谢顾志耐和散沙,让我喜欢上了python。 什么是时间序列 时间序列简单的说就是各时间点上形成的数值序列,时间序列分析就是通过观察历史数据预测未来的值。在这里需要强调...
Let’s annotate thesearch4vowelsfunction’s arguments. The first annotation states that the function expects a string as the type of thewordargument (:str), while the second annotation states that the function returns a set to its caller (-> set): Annotation syntax is straightforward. Each fu...
The HTTP trigger is defined as a method that takes a named binding parameter, which is an HttpRequest object, and returns an HttpResponse object. You apply the function_name decorator to the method to define the function name, while the HTTP endpoint is set by applying the route decorator....
movie_name): movie_dict[k] = v return movie_dict # Function to create training validation and test data def train_val(df,val_frac=None): X,y = df[['userID','movieID']].values,df['rating'].values #Offset the ids by 1 for the ids to start from zero X = X - 1 if val_...
However, if you want to continue to work with the result of your function and try out some operations on it, you will need to use the return statement to actually return a value, such as a String, an integer, …. Consider the following scenario, where hello() returns a String "hello...
Also inapp.py, add a function that returns content, in this case a simple string. Use Flask'sapp.routedecorator to map the URL route "/" to that function: Python @app.route("/")defhome():return"Hello World! I'm using Flask." ...
If you want to do something with the result of an expression, you need to say so: you might store it with an assignment statement or return it with a return statement. 1.5.2 Compound Statements A compound statement is so called because it is composed of other statements. ...
[DataFrame]'Read SQL database table into a DataFrame.Given a table name and a SQLAlchemy connectable, returns a DataFrame.This function does not support DBAPI connections.Parameters---table_name : strName of SQL table in database.con : SQLAlchemy connectable or strA database URI could be pr...