Python / Data Structures
Sum of integers in array
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To find the sum of integers in an array, simply iterate through the array and add each integer to a total sum.
Determining Grade Distribution for Each Student
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This technical problem involves creating a new dataframe that includes the grade distribution for each student. Given a dataframe of student grades, the code solution should return a new dataframe with the grade distribution for each student.
Find the row with the maximum value in column C and return the values in...
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Given a dataframe, find the row with the maximum value in column 'C' and return the values in columns 'A' and 'B' for that row.
Given a list of integers, return a dictionary with the integer as the key and...
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Given a list of integers, this function returns a dictionary with the integer as the key and the number of times the integer appears in the list as the value.
Calculating Averages for Student Grades
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This code calculates the average grade for each student in a dataframe.
Calculating Percent Change in Stock Prices
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To calculate the percent change in stock prices, we can simply subtract the stock price on the previous day from the stock price on the current day, and divide by the previous day's stock price .
Counting the occurrences of integers in a list
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Given a list of integers, this function will return a dictionary with the integers as keys and the number of times each integer appears in the list as values.
Keep only certain columns in a dataframe
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This technical problem deals with how to keep only certain columns in a dataframe using Python. A function is provided that takes in a dataframe and a list of column names, and returns a new dataframe with only the columns in the list. An example is given of input and output.
