PY4E | Codes pertaining to University of Michigan 's Python | SQL Database library
kandi X-RAY | PY4E Summary
kandi X-RAY | PY4E Summary
Codes pertaining to University of Michigan's Python For Everybody Specialization course on Coursera. Content includes Python Programming, Syntax, and Semantics, JSON & XML parsing, Databases (DBMS), Data Structures, Web Scraping, Sqlite, and SQL.
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Top functions reviewed by kandi - BETA
- Diagnostic for BeautifulSoup
- Return a string representation of the entity
- Return the formatter for the given name
- Pretty - print the string
- Start a new tag
- Extracts the namespace from the lxml tag
- Return the prefix for a namespace
- Parse email header
- Resolve a sender name
- End tag handler
- Profile BeautifulSoup
- Register a TreeBuilder from a module
- Removes this element from the tree
- Find the first parent with the given attributes
- Unknown declarations
- Extracts the contents of this object
- Handle a declaration
- Feed the markup
- Attempt to convert a document to HTML
- Parse a md5 date
- Return an iterator over the available encodings
- Benchmark the HTML parser
- Fix the given sender name
- The string representation of this node
- Handle opening tag
- Handle character references
PY4E Key Features
PY4E Examples and Code Snippets
Community Discussions
Trending Discussions on PY4E
QUESTION
The txt file is saved in the exact same folder as my code but when I run it I get that traceback. I right clicked saved file directly to folder but when run the code vs studio. I am very new to code sorry for the basic question.
ANSWER
Answered 2021-Feb-11 at 10:35Try file = open('./regex_sum_1114202.txt', 'r') instead.
- This explicitly specifies that Python should look for the file in the current directory by providing the relative path. Think of the point as a shorthand for the current working directory. So if the current working directory is the directory where the script and the file is, that should work.
- Use forward slashes (
/) instead of backslashes (\). Backslashes are the default directory separator on Windows, but here they make problems because they are interpreted as escape sequences by Python. Alternatively, you can use two backslashes after another as directory separator:\\.
You can also try to specify the full path before the filename: file = open('c:/Users/EM2750/Desktop/py4e/ex_11/regex_sum_1114202.txt', 'r'). The downside is of course that the path wouldn't be correct anymore if you'd move the file.
QUESTION
I am trying to make a get request with axios to return all 87 objects in this api: https://swapi.py4e.com/api/people/
If we choose to show one object we modify the url like that "https://swapi.py4e.com/api/people/2" this returns the properties of the second object in the api so I thought if I try to make a simple for loop to fetch all 87 objects one by one:
...ANSWER
Answered 2021-Jan-28 at 20:53If you are trying to do 87 fetch then you just need to use var "i". The way you are doing now you will get the following values
1,2,4,7,11,16,22....92
Calculated from the sum of n + i
0+1, 1+1, 2+2, 4+3, 7+4, 11+5, 16+6,.....92
Try this:
QUESTION
I have been working on the Python for Everybody Chapter 9 Exercise 1.
The exercise assignment is as follows:
Exercise 1: Download a copy of the file www.py4e.com/code3/words.txt
Write a program that reads the words in words.txt and stores them as keys in a dictionary. It doesn’t matter what the values are. Then you can use the in operator as a fast way to check whether a string is in the dictionary.
And here is link to a screenshot of my code:
Basically, I would like an explanation of what Lines 10-12 is actually doing in this code, especially Line 12. (I became stuck/confused with the exercise and took lines 10-12 from another person's example)
I know that the code succeeds in storing all of the words from the file into a dictionary as the exercise asked, but I just don't understand how it did so?
Thank you for your help.
...ANSWER
Answered 2021-Jan-15 at 01:20Line 10 loops over all of the words in the list words. The code in lines 11 and 12 is executed for every element in that list, each time keeping the current element in the variable word.
Line 11 just increments a counter (count) by 1 every loop, I assume just to have something to put as the values in the dictionary.
Line 12 adds the current value of count to the dictionary make_dictionary at key word.
The result is a dictionary where the keys are the words from the file, and the values integers starting from 1.
QUESTION
Stuck on an assignment dealing with URL and XML parsing. I've got the data out but can't seem to get findall() to work. I know that once I can get findall() to work I'll have a list to loop through to. Any insight would be great and hoping to get a gentle nudge versus an outright answer if possible. Thank you!
...ANSWER
Answered 2020-Nov-16 at 21:06findall is not recursive, meaning it will not find a node/element if it is not directly under the element you called findall on (if not using xpath, that is).
Instead, use iter:
QUESTION
I have a URL and am trying to sum the numbers on it, through span tags. Can anyone help to amend the code below to do such a thing?: (the URL is: http://py4e-data.dr-chuck.net/comments_1050359.html)
...ANSWER
Answered 2020-Nov-08 at 09:36To sum all the numbers, you can try this:
QUESTION
I'm using re.findall() to extract a number from lines in a file & I can get the number just fine, but the function adds quotes and double quotes and square brackets so that I can't convert the string to float. How do I strip the " [ ' ' ] " characters from the number so I can convert it?
Here's my code:
...ANSWER
Answered 2020-Oct-24 at 07:04s = "['123']"
s = s[2:-2] # remove first 2 and last 2 characters
print(float(s))
# 123.0
QUESTION
I'm trying to convert a list of tuples to a composite-key dictionary so I can custom sort by either first or last:
...ANSWER
Answered 2020-Oct-20 at 01:42dict.update updates a dictionary with the key/value pairs from an other dict. What you are adding is a tuple not dict. Then change new to:
QUESTION
I tried to sum up the values that I scraped from the html, however the sum seem very strange.(It obviously lower than the actual value.)
I have looked over other people code and I noticed that they use the re.findall() to find the numbers in html.
My question is that why I could not directly crawl the content element from the html? my code is in above and the bottom one is part of code that other people's code different from mine code.
Thank you for your answer in advance!
...ANSWER
Answered 2020-Oct-09 at 22:01If I understand you correctly, this should get you there:
QUESTION
Why does my code print the empty list?
...ANSWER
Answered 2020-Sep-24 at 10:04There are two issues that I found:
- Be careful with the indent, which results the empty print
- The space is matter to find the correct begging place, I accidentally missed the space so that produce the duplicated or repeated result.
QUESTION
I was doing the exercises from the PY4E textbook. In the string section, we had an exercise where we have to print out the characters of a string backwards.
I think the code was good enough until I executed the program. While debugging, I found out that the value of the index suddenly became -7.
I know putting an if and break statement will fix this but I just wanted to know why did this happen. Advance Thanks!
...ANSWER
Answered 2020-Sep-23 at 03:28You may want to try the following code:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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You can use PY4E like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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