My question is same as Scraping all mobiles of Flipkart.com. I tried the solution given over there, but that change in the start variable is not working , and I can only scrape the starting twenty mobile information only. The initial value of start was 21, so increased to 50, but still I am getting the same r…
Tag: python
What does the $ mean when running commands?
I’ve been learning Python, and I keep running into the $ character in online documentation. Usually it goes something like this: $ python ez_setup.py (Yeah, I’ve been trying to install setup tools) I’m fairly certain that this command isn’t for the python IDE or console, but I’ve…
Misunderstood python yield
This code below works correct : But this function raises StopIteration. I don’t understand why ? Answer You have: Notice line = f.readline() This only reads 1 line from the file. Compare: with this: yield can only be called once with a particular object or expression. Once it is used by the receiver it …
python Decimal – checking if integer
I am using the Decimal library in Python, and printing out the values using format(value, ‘f’), where value is a Decimal. I get numbers in the form 10.00000, which reflects the precision on the decimal. I know that float supports is_integer, but there seems to be a lack of a similar API for decima…
Comparing two pandas dataframes for differences
I’ve got a script updating 5-10 columns worth of data , but sometimes the start csv will be identical to the end csv so instead of writing an identical csvfile I want it to do nothing… How can I compare two dataframes to check if they’re the same or not? Any ideas? Answer You also need to be…
Create a typewriter-effect animation for strings in Python
Just like in the movies and in games, the location of a place comes up on screen as if it’s being typed live. I want to make a game about escaping a maze in python. At the start of the game it gives the background information of the game: Under the variables, I tried to do a for loop for
Check if a string contains a number
Most of the questions I’ve found are biased on the fact they’re looking for letters in their numbers, whereas I’m looking for numbers in what I’d like to be a numberless string. I need to enter a string and check to see if it contains any numbers and if it does reject it. The function …
how to hash a “json” nested dictionary identically in Python and JavaScript?
What’s the best way to consistently hash an object/dictionary that’s limited to what JSON can represent, in both JavaScript and Python? What about in many different languages? Of course there are hash functions implemented consistently in many different languages that take a string, but to hash an…
Convert datetime to Unix timestamp and convert it back in python
I have dt = datetime(2013,9,1,11), and I would like to get a Unix timestamp of this datetime object. When I do (dt – datetime(1970,1,1)).total_seconds() I got the timestamp 1378033200. When converting it back using datetime.fromtimestamp I got datetime.datetime(2013, 9, 1, 6, 0). The hour doesn’t …
Difference between map, applymap and apply methods in Pandas
Can you tell me when to use these vectorization methods with basic examples? I see that map is a Series method whereas the rest are DataFrame methods. I got confused about apply and applymap methods though. Why do we have two methods for applying a function to a DataFrame? Again, simple examples which illustr…