What is the difference between the data and json parameters in the python Requests package? It is unclear from the documentation Does this code: Note that we convert the dict to JSON here ☝️ ! Do anything different than: If so, what? Does the latter automatically set the content-type in the header to applicat…
Tag: python
How to show PIL Image in ipython notebook
This is my code I would like to do some image manipulation on it, and then show it on screen. I am having problem with showing PIL Image in python notebook. I have tried: And just But both just give me: Answer Updated 2021/11/17 When using PIL/Pillow, Jupyter Notebooks now have a display built-in that will sh…
Printing 2 numbers before comma
I want to print numbers with precision to 2 digits before dot and 3 after. Example: will show: I know that will show me 3 digits after dot but how to get 2 digits before dot with 0 if that is shorter than 2 digits? Answer You can specify a total width for the output; if you include a leading
Python requests module sends JSON string instead of x-www-form-urlencoded param string
I was under the impression that POSTSs using x-www-form-urlencoded specifications should send a URL encoded param string in the body of the post. However, when I do this The body of the request on the receiving end looks like this: But I was expecting to get this How I can get Requests to send the data in the…
Python pandas apply function if a column value is not NULL
I have a dataframe (in Python 2.7, pandas 0.15.0): I want to apply a simple function for rows that does not contain NULL values in a specific column. My function is as simple as possible: And my apply code is the following: It works perfectly. If I want to check column ‘B’ for NULL values the pd.n…
Python Ctypes: Convert returned C array to python list, WITHOUT numpy
I am using Python Ctypes to access some C library. One of the functions I connected to, returns const *double, which is actually an array of doubles. When I get the result in Python, how can I convert this array to a python list? The signature of the C function: Let’s assume that it returns an array tha…
How does one ignore unexpected keyword arguments passed to a function?
Suppose I have some function, f: Now, if I have a dictionary such as dct = {“a”:”Foo”}, I may call f(**dct) and get the result Foo printed. However, suppose I have a dictionary dct2 = {“a”:”Foo”, “b”:”Bar”}. If I call f(**dct2) I get a Fa…
How to send a dynamically generate zipfile to the client
I am looking for a way to send a zipfile to the client that is generated from a requests response. In this example, I send a JSON string to a URL which returns a zip file of the converted JSON string. But my zip file is empty and the error returned by flask is Answer You should return the file
Accessing an attribute of a multiprocessing Proxy of a class
I have a class that I want to share in a read-only fashion with children processes in a pool, so I prepared a proxy of a class but it didn’t work. The following is a simplified example of my problem. When I run this code I get: It seems that I cannot access the attribute of a shared object directly
How to copy all attributes of one Python object to another?
I’ve got two classes, of which one inherits from the other: I now create a Parent and change the attributes: And from this point, I want to create a Child in which I want to copy all the attributes from the parent. I can of course do this like so: The thing is that while developing, this class will grow