When I edit a YAML file in Python with PyYAML, all of my string values are saved back to the original file without quotes. I wanted one of those strings to be surrounded with single quotes: Changing the default_style parameter in yaml_dump affects whole file, which is not desired. I thought about adding singl…
Tag: python
ntlk: how to get inflections of words
I have a list of words, nearly 5000 English words, and for each word I need these inflectional forms: noun: singular and plural verb: infinitive, present simple, present simple 3rd person, past simple, present participle (ing form), past participle adjective: comparative and superlative adverb How can I extra…
Pyautogui TypeError: ‘NoneType’ object is not iterable
I’m trying to use locateCenterOnScreen() function of PyAutoGUI, however it raises : My code is: How can I fix this problem? Answer From the documentation of Pyautogui here, the method locateCenterOnScreen returns None when it can’t find the image on your screen. Note that you are looking for 2 res…
Hide tick label values but keep axis labels
I have this image: I want to hide the numbers; if I use: …I get this image: It also hide the labels, V and t. How can I keep the labels while hiding the values? Answer If you use the matplotlib object-oriented approach, this is a simple task using ax.set_xticklabels() and ax.set_yticklabels(). Here we c…
String/regex search over Excel in Python issue
I’m a newb to SO, and relatively new to Python, so i’m sorry if this is a simple fix or an inappropriate question. Firstly, my program generally works, but i’m trying to implement some redundancy/catchalls for to make it robust. The program looks over a directory (and sub-dirs) of excel file…
Specify max and min in NumberInput widget
I have a form that is using NumberInput widget to accept a rating for a Song from the user. The number should be between 0-5. My Song model has a MaxValueValidator but I want the NumberInput widget to show options only from 0-5. Answer In your form you can add min and max value which atleast shows the user th…
pandas dataframe str.contains() AND operation
I have a df (Pandas Dataframe) with three rows: The function df.col_name.str.contains(“apple|banana”) will catch all of the rows: How do I apply AND operator to the str.contains() method, so that it only grabs strings that contain BOTH “apple” & “banana”? I’d like…
how to turn protocol number to name with python?
the protocol like tcp and udp is all represented by a number. the above code will return 6. How I can get the protocol name if I know the protocol number? Answer I’m going to say there is almost definitely a better way then this, but all the protocol names (and values) are stored as constants prefixed b…
Python – Tree without classes
How can I implement a tree without using classes in python? I can only use lists, dictionaries and queue. Obviously without the library bintree. Answer I usually use defaultdict: Usage: bonus: Maria Callas singing O Mio Babbino Caro
Pandas replace all items in a row with NaN if one value is NaN
I want to get rid of some records with NaNs. This works perfectly: However, it changes the shape of my dataframe, and the index is no longer uniformly spaced. Therefore, I’d like to replace all items in these rows with np.nan. Is there a simple way to do this? I was thinking about resampling the datafra…