Python / Speech recognition / Google recognition

Install dependencies:

pip3 install SpeechRecognition
pip3 install pyaudio

Test installation:

python3 -m speech_recognition

Try:

import speech_recognition

recognizer = speech_recognition.Recognizer()

exitRequested = False

while True:
    with speech_recognition.Microphone() as source:
        recognizer.adjust_for_ambient_noise(source, duration = 1)

        print("Speak: ")

        audio = recognizer.listen(source)

        try:
            text = recognizer.recognize_google(audio, None, "en-US")

            print("Said: " + text)

            if (text is not None and text == "exit"):
                break
        except:
            print("Error on trying to recognize audio.")

TensorFlow - Fedora 32

packages="absl absl-py astunparse gast google google-api-python-client google-cloud-translate \
class="source">google-pasta keras keras_preprocessing matplotlib numpy opt_einsum protobuf tensorboard \
termcolor wrapt tenssorboard tensorflow"

for package in $packages; do
    sudo pip install $package
done

Apache Tomcat - Administration configuration

In config/tomcat-users.xml add:

<role rolename="admin-gui"/>
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<user username="tomcat" password="<PASSWORD>" roles="admin-gui, manager-gui, manager-script"/>

Replace <PASSWORD> with your Tomcat appropriate password.

Python - Return array from array iteration

def x():
    return [[i, j]
            for i in [1, 2, 3]
            for j in [3, 4, 5]]

y = x()

for i in y:
    print(i[0], i[1])

Output:

1 3
1 4
1 5
2 3
2 4
2 5
3 3
3 4
3 5

Python / Serialization / JSON / Base64

import json
import base64

# JSON

account_str =  '{ "name": "AJ", "number": "123-4", "bank": {"name": "Abc", "branch": "555", "code": "123"}, "balance": 123.45}'

# Encode with base64 algorithm

encoded = base64.b64encode(account_str.encode())

print('base64 encoded string:', encoded.decode())

# Decode string from base64 algorithm

decoded = base64.b64decode(encoded)

print('base64 decoded string:', decoded.decode())

# Parse JSON

account = json.loads(decoded.decode())

# Bank account information

quotation = {'BRL': {'USD': 4.08}}

print('')
print('ACCOUNT INFORMATION:')
print(30*'-')
print('Name: ' + account["name"]) 
print('Bank: ' + account["bank"]["name"] + ', branch: ' + account["bank"]["branch"]) 
print('Account number: ' + account["number"]) 
print('Balance: USD {0:.2f} (BRL {1:.2f})'.format(account["balance"], (account["balance"] * quotation['BRL']['USD'])))
print('')

Output:

ACCOUNT INFORMATION:
------------------------------
Name: AJ
Bank: Itaú, branch: 555
Account number: 123-4
Balance: USD 123.45 (BRL 503.68)

Python / Call class method by name

class Test:
    def do(self):
        print("Test.do()")

        name = 'status'

        methodName = 'set' + name.capitalize()

        print('Method name: ' + methodName)

        method = getattr(self, 'setStatus')

        if method is None:
            print("Method is not valid.")
            return

        method(5)
        method("abcde")

    def setStatus(self, value):
        print("Test.setStatus() value=" + str(value))

test = Test()

test.do()

Output:

Test.do()
Method name: setStatus
Test.setStatus() value=5
Test.setStatus() value=abcde

Search / replace in VIM with incremental replacement

Search for #1# and replace with incremental number:

let @a=1 | %s/#1#/\=''.(@a+setreg('a',@a+1))/g

wxWidgets / MinGW / MSys

wxWidgets built in MinGW/MSys 32-bit:

../wxWidgets/configure --prefix=<OUTPUT_DIR> --build=x86-winnt-mingw32 --disable-shared --disable-threads --enable-cxx11

make

make install

Fedora Magazine - PostgreSQL 9.5: A quick start on Fedora 24

https://fedoramagazine.org/postgresql-quick-start-fedora-24/

Lua basics 01

Calculate factorial of a number.

-- Calculate factorial

function factorial(number)
    if number == 0 then
        return 1
    else
        return number * factorial(number - 1)
    end
end

-- Main function

function main()
    io.write("Enter the number to get the its factorial value: ")

    userInput = io.read("*number")

    if userInput == nil then
        print("User input is invalid.")

        os.exit()
    end

    number = factorial(userInput)

    io.write("factorial of ", userInput, ": ", number, "\n")
end

main()

wxWidgets - Build - Windows - Msys

../wxWidgets/configure --prefix=<WXWIDGETS_SRC_DIR>/dist \
 --enable-static --disable-shared --with-libpng --with-libjpeg --without-libtiff \
--with-libxm --with-libiconv --with-regex=builtin --disable-stc --enable-htmlhelp \
--enable-aui --enable-grid --enable-timer --enable-dynlib --enable-dynamicloader \
--enable-debug --enable-debug_gdb --with-expat=builtin

make

make install

Financer 0.2.14 - Accounting - Chart of accounts

Financer - Monetary amount internationalization

Amount formats:

9,999.00 - United States
9.999,00 - Brazil

There are 2 categories of amount:

- Generic number value
- Monetary value.

Financer - Date and time internationalization

Need to implement a way to work with date and time in a way internationalized way.

There are two modes, input and output.
The output mode is to show date on user interface and the output mode to store in the database.

The output mode to store in the database is based on ISO 8601: YYYY-MM-DD

For the input mode there are predefined supported formats based by region/country:

• MM/DD/YYYY: Used on United States.
• DD/MM/YYYY: Used on Brazil.

Other formats for output will be added.

Financer dependencies on Fedora 21 64-bit

Listing executable dependencies:

[allann@mars gui]$ rpm -q --whatprovides $(ldd build/linux/bin/financer | \
sed 's/.*=>//g' | sed 's/ *(.*//g') | sed 's/-[0-9]\+.*//g' | sort | uniq
atk
at-spi2-atk
at-spi2-core
bzip2-libs
cairo
cairo-gobject
cyrus-sasl-lib
dbus-libs
enchant
expat
fontconfig
freetype
gdk-pixbuf2
glib2
glibc
graphite2
gstreamer1
gstreamer1-plugins-base
gtk3
harfbuzz
harfbuzz-icu
jbigkit-libs
keyutils-libs
krb5-libs
libcom_err
libdrm
libffi
libgcc
libgcrypt
libgpg-error
libICE
libicu
libjpeg-turbo
libnotify
libpng
libsecret
libselinux
libSM
libsoup
libstdc++
libtiff
libuuid
libwayland-client
libwayland-cursor
libwayland-server
libwebp
libX11
libXau
libxcb
libXcomposite
libXcursor
libXdamage
libXext
libXfixes
libXi
libXinerama
libxkbcommon
libxml2
libXrandr
libXrender
libxshmfence
libxslt
libXt
libXxf86vm
mesa-libEGL
mesa-libgbm
mesa-libGL
mesa-libglapi
nspr
nss
nss-softokn-freebl
nss-util
openldap
openssl-libs
orc
pango
pcre
pixman
postgresql-libs
sqlite
webkitgtk3
xz-libs
zlib

So install Financer dependencies with the command:

# sudo yum install atk at-spi2-atk at-spi2-core bzip2-libs cairo \
cairo-gobject cyrus-sasl-lib dbus-libs enchant expat fontconfig \
freetype gdk-pixbuf2 glib2 glibc graphite2 gstreamer1 gstreamer1-plugins-base \
gtk3 harfbuzz harfbuzz-icu jbigkit-libs keyutils-libs krb5-libs libcom_err \
libdrm libffi libgcc libgcrypt libgpg-error libICE libicu libjpeg-turbo \
libnotify libpng libsecret libselinux libSM libsoup libstdc++ libtiff \
libuuid libwayland-client libwayland-cursor libwayland-server libwebp \
libX11 libXau libxcb libXcomposite libXcursor libXdamage libXext libXfixes \
libXi libXinerama libxkbcommon libxml2 libXrandr libXrender libxshmfence \
libxslt libXt libXxf86vm mesa-libEGL mesa-libgbm mesa-libGL mesa-libglapi \
nspr nss nss-softokn-freebl nss-util openldap openssl-libs orc pango pcre \
pixman postgresql-libs sqlite webkitgtk3 xz-libs zlib