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    Thread: custom sqrt
Post: RE: custom sqrt

I modified if abs(a-b) < tolerance: return bto if abs(a-b) <= tolerance: return bWhen I run the code on my work pc, the sqrt appears as expected, for example: [Image: https://drive.google.com/f...
bluefrog General Coding Help 4 3,053 Jul-14-2019, 08:12 PM
    Thread: custom sqrt
Post: custom sqrt

I am attempting to create a sqrt function using mainly recursion with the use of a lambda. I picked the code up from a book "Functional Python Programming 2ed". The example is shown in the 1st chapte...
bluefrog General Coding Help 4 3,053 Jul-12-2019, 02:51 PM
    Thread: to_numpy() works in jupyter notebook, but not in python script
Post: RE: to_numpy() works in jupyter notebook, but not ...

I have 0.23 on my Ubuntu Linux, but 0.24 on my miniconda environment. I used sudo apt-get install in an attempt to update pandas to 0.24, but I get this message: $ sudo apt-get install python3-panda...
bluefrog Data Science 7 10,128 Jun-27-2019, 10:35 AM
    Thread: to_numpy() works in jupyter notebook, but not in python script
Post: RE: to_numpy() works in jupyter notebook, but not ...

Thanks for spotting the missing comma. The error that appears is as follows: Traceback (most recent call last): File "./dataframe_swap_columns.py", line 23, in <module> df_copy.loc[:, ['B...
bluefrog Data Science 7 10,128 Jun-27-2019, 10:13 AM
    Thread: to_numpy() works in jupyter notebook, but not in python script
Post: to_numpy() works in jupyter notebook, but not in p...

Hi I am unsure why the following works in a jupyter notebook, but not in a python script that I am run from the Linux command line: #!/usr/bin/python3 import pandas as pd import numpy as np # SWAPP...
bluefrog Data Science 7 10,128 Jun-26-2019, 05:54 PM
    Thread: future warning when using numpy fancy indexing
Post: future warning when using numpy fancy indexing

After loading arrays from a data file, I get a future warning message when I try and use the result of one of the arrays as a mask over another; this generates the same error, but uses sample data in...
bluefrog Data Science 0 4,247 Nov-20-2018, 09:44 AM
    Thread: numpy dtype anomaly
Post: RE: numpy dtype anomaly

thanks. it now works. so basically one has to specify your record column names and data types each time you extract an arbitrary set of column number(s). mmmm, bit clunky.
bluefrog Data Science 4 3,474 Nov-07-2018, 12:37 AM
    Thread: numpy dtype anomaly
Post: RE: numpy dtype anomaly

I've reduced the number of columns to 4, and still the error occurs if usecols is specified. If not, it succeeds in loading each column into an array. I've taken out the missing column, which is colum...
bluefrog Data Science 4 3,474 Nov-07-2018, 12:00 AM
    Thread: numpy dtype anomaly
Post: numpy dtype anomaly

I'm attempting to load 2 arrays from 2 columns read from a file . The file is delimited and I'm using numpy's loadtxt() function to load the arrays, like so: #!/usr/bin/python3 import sys import num...
bluefrog Data Science 4 3,474 Nov-05-2018, 09:09 PM
    Thread: pathlib hanging
Post: pathlib hanging

Its the first time I'm using pathlib. Any reference to it seems to hang. Is it something to so with permissions ? I'm working under my home directory, so there shouldn't be an issue. Output:bluefrog@p...
bluefrog General Coding Help 2 3,089 Sep-23-2018, 08:56 PM
    Thread: type hint additional message
Post: RE: type hint additional message

I've created a mypy.ini as suggested in the link you posted: $ pwd /home/bluefrog/anaconda3/pkgs/mypy-0.620-py37_0 $ cat > mypy.ini <<EOF > [mypy] > python_version = 3.7 > warn_retur...
bluefrog Homework 5 3,296 Sep-17-2018, 07:28 PM
    Thread: type hint additional message
Post: RE: type hint additional message

celcius_to_fahrenheit.py:8: error: Unsupported operand types for - ("None" and "int") celcius_to_fahrenheit.py:8: note: Left operand is of type "Union[int, float, Decimal, None]" celcius_to_fahrenheit...
bluefrog Homework 5 3,296 Sep-17-2018, 09:14 AM
    Thread: type hint additional message
Post: type hint additional message

I'm attempting to type hint on a temperature conversion function. The function has a deliberate mistake in that it returns a Number instead of a dictionary, but the return statement is for a Dictionar...
bluefrog Homework 5 3,296 Sep-16-2018, 09:38 PM
    Thread: Problem with for loops
Post: RE: Problem with for loops

This was a wrong post!!!
bluefrog Homework 4 3,249 Sep-16-2018, 09:31 PM
    Thread: write split words of sentence to file
Post: write split words of sentence to file

When I test the split on Python's IDLE, I get a list of words, for example: Python 3.6.5 (default, Apr 1 2018, 05:46:30) [GCC 7.3.0] on linux Type "help", "copyright", "credits" or "license" for mor...
bluefrog Homework 1 2,952 Aug-26-2018, 08:51 PM
    Thread: code copy from pep-3134
Post: code copy from pep-3134

I'm attempting to run the snippet of code in PEP-3134, but I'm not getting the errors stated. The code relates to implicit exception handling. The expectation, according to the PEP, is: Quote:The ult...
bluefrog General Coding Help 1 2,177 Aug-26-2018, 02:59 PM
    Thread: sorting a list of tuples based on date
Post: sorting a list of tuples based on date

Hi I am unsure whether the tuple is sorted or not. There appears to be no difference to the list of tuples after being sorted. #!/usr/bin/python3 import operator from datetime import datetime phones...
bluefrog General Coding Help 2 5,727 Aug-09-2018, 09:09 PM
    Thread: python format conversion
Post: python format conversion

Hi I'm just wondering why I cannot print the following: #!/usr/bin/python3 some_integer = 10 some_string = "Hello World" print("{some_integer!r} {some_string!r} ".format(some_integer, some_string))Bu...
bluefrog Homework 2 2,636 Jul-22-2018, 02:52 PM
    Thread: exclusive bitwise OR
Post: exclusive bitwise OR

Hi Am using 3.6.5 I'm trying to display the result of a bitwise operation, like so: xor = 0b0011 ^ 0b0111 print ("Example of exclusive OR - xor = 0b0011 ^ 0b0111: ".format(bin(xor)))But nothing appea...
bluefrog Homework 1 2,166 Jul-10-2018, 12:26 PM
    Thread: printing main doc
Post: printing main doc

I have a doc declared at the top of a script, like so: #!/usr/bin/python3 import re """ A Twitter username can only contain alphanumeric characters (A-Z numbers 0-9). The exception being an underscor...
bluefrog General Coding Help 1 2,488 Jun-27-2018, 11:13 AM

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