cracking-the-coding-interview | various problems in this book as part | SQL Database library
kandi X-RAY | cracking-the-coding-interview Summary
kandi X-RAY | cracking-the-coding-interview Summary
My solutions to various problems in this book as part of a practice run for interviews in 2018.
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Top functions reviewed by kandi - BETA
- Generate all the queens of n
- Print a board
- Check if new_col is valid
- Move the given number of disks
- Print source and buffer data
- Find the smallest difference between a and b
- Pretty print the source and buffer
- Return all permissions of a string
- Return a set of permutations of strings
- Paint a matrix
- Multithm
- Return True if two strings are the same
- Return the number of steps
- Check if two strings are away
- Return a subset of subsets
- Return a set of parentheses
- Merge two lists
- Recursively finds the path in the given path
- Returns a set of all coin permissions for n - grams
- Return the height of a list of boxes
- Return the index of a value in a sequence
- Compress a string
- Zero out all rows
- URLize a string
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QUESTION
I am pretty new to working with jupyter notebook. I overall like it, although I sometimes get some weird errors that sometimes appear and then sometimes do not. For example, I have a data set that looks like this (showing the .head()):
Now, if I set say volume = data["avg_volume"], and then say volume.head() I get this:
But lets say I delete that line and put it somewhere else, I sometimes will get this error:
...ANSWER
Answered 2018-Sep-17 at 18:19In your code for data in pnl
, you redefined the variable data
, so it is no longer a DataFrame
and cannot by indexed by a colum name.
And BTW, many bugs like this can be found out when you are trying to produce a minimal, complete, verifiable example. You'll notice that when you remove the for
loop this bug is gone.
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