The tensorflow python module - part 004.

If you using the tensorflow then you can get some warnings.
You can use warnings python package to manage all of this:

[mythcat@desk ~]$ $ python3
Python 3.5.2 (default, Jul 10 2019, 11:58:48)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import warnings
>>> import tensorflow as tf
/home/mythcat/.local/lib/python3.5/site-packages/tensorflow/python/framework/dtypes.py:516: FutureWarning: 
Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be 
understood as (type, (1,)) / '(1,)type'.
  _np_qint8 = np.dtype([("qint8", np.int8, 1)])
/home/mythcat/.local/lib/python3.5/site-packages/tensorflow/python/framework/dtypes.py:517: FutureWarning: 
Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be 
understood as (type, (1,)) / '(1,)type'.
...

/home/mythcat/.local/lib/python3.5/site-packages/tensorboard/compat/tensorflow_stub/dtypes.py:550: 
FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of 
numpy, it will be understood as (type, (1,)) / '(1,)type'.
  np_resource = np.dtype([("resource", np.ubyte, 1)])
>>>
>>> warnings.filterwarnings('ignore')
>>>
[7]+  Stopped                 python3

Use it in this way to filter these warnings:

[mythcat@desk ~]$ $ python3
Python 3.5.2 (default, Jul 10 2019, 11:58:48)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import warnings
>>> warnings.filterwarnings('ignore',category=FutureWarning)
>>> import tensorflow as tf
>>> 

Python 3.7.4 : Print with random colors.

This is a simple example for custom print output.
The script detect the platform for color settings and then use print.
The first print will print with blue color the name of the script.
I used random to select a random color from colors array and used to print the -=RANDOM COLOR=- text.
The print (W+'') is used to set default white color for terminal

import sys
import random
if sys.platform == "linux" or sys.platform == "linux2":
        BB = "\033[34;1m" # Blue light
        YY = "\033[33;1m" # Yellow light
        GG = "\033[32;1m" # Green light
        WW = "\033[0;1m"  # White light
        RR = "\033[31;1m" # Red light
        CC = "\033[36;1m" # Cyan light
        B = "\033[34m"    # Blue
        Y = "\033[33m"    # Yellow
        G = "\033[32m"    # Green
        W = "\033[0m"     # White
        R = "\033[31m"    # Red
        C = "\033[36m"    # Cyan
colors = [BB,YY,GG,WW,RR,CC,B,Y,G,W,R,C]
print (B+"\033[2;2m "+sys.argv[0]+"\n"+B)

color=random.choice(colors)
print (color+"-=RANDOM COLOR=-"+color)
print (W+'')

For winodws platform you need to add this:

elif sys.platform == "win32":

 BB = '' # Blue light
 YY = '' # Yellow light
 GG = '' # Green light
 WW = '' # White light
 RR = '' # Red light
 CC = '' # Cyan light
 B = ''  # Blue
 Y = ''  # Yellow
 G = ''  # Green
 W = ''  # White
 R = ''  # Red
 C = ''  # Cyan
 P = ''  # Random color

Python 3.7.4 : Using the theano pakage.

If you want to test theano then you need to see this webpage.

[root@desk mythcat]# dnf search theano
======================== Name & Summary Matched: theano ========================
python-theano-doc.noarch : Theano documentation
============================= Name Matched: theano =============================
python3-theano.noarch : Mathematical expressions involving multidimensional
                      : arrays
=========================== Summary Matched: theano ============================
python3-lasagne.noarch : Lightweight library to build and train neural networks
                       : in Theano
[root@desk mythcat]# pip3 install Theano --user
WARNING: Running pip install with root privileges is generally not a good idea. 

Try `pip3 install --user` instead.
Collecting Theano
...
  Running setup.py install for Theano ... done
Successfully installed Theano-1.0.4 scipy-1.3.1

Let's see first example:

[mythcat@desk ~]$ python3 
Python 3.7.4 (default, Jul  9 2019, 16:32:37) 
[GCC 9.1.1 20190503 (Red Hat 9.1.1-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import theano
/home/mythcat/.local/lib/python3.7/site-packages/theano/configdefaults.py:560: 

UserWarning: DeprecationWarning: there is no c++ compiler.This is deprecated and with 

Theano 0.11 a c++ compiler will be mandatory
  warnings.warn("DeprecationWarning: there is no c++ compiler."
WARNING (theano.configdefaults): g++ not detected ! Theano will be unable to execute 

optimized C-implementations (for both CPU and GPU) and will default to Python implementations.

 Performance will be severely degraded. To remove this warning, set Theano flags cxx to an empty

 string.
WARNING (theano.tensor.blas): Using NumPy C-API based implementation for BLAS functions.
>>> import theano
>>> import theano.tensor as T
>>> x = T.dmatrix('x')
>>> s = 1 / (1 + T.exp(-x))
>>> logistic = theano.function([x], s)
>>> logistic([[0, 1], [-1, -2]])
array([[0.5       , 0.73105858],
       [0.26894142, 0.11920292]])
>>> ... 

Python 3.7.4 : Using the sunpy - part 001.

I wrote about sunpy in the past on this website.
Now this package comes with new features, see the official webpage.
Let's install it.

[mythcat@desk ~]$ pip3 install sunpy --user
Collecting sunpy
...
Successfully installed aioftp-0.13.0 aiohttp-3.6.0 astropy-3.2.1 async-timeout-3.0.1 
multidict-4.5.2 parfive-1.0.0 scipy-1.3.1 sunpy-1.0.3 tqdm-4.35.0 yarl-1.3.0

If you search on web you can find example with spectra , but in the new package is not supported.

ModuleNotFoundError: No module named 'sunpy.spectra'

Let's test it:

[mythcat@desk ~]$ python3 
Python 3.7.4 (default, Jul  9 2019, 16:32:37) 
[GCC 9.1.1 20190503 (Red Hat 9.1.1-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sunpy
>>> dir(sunpy)
['SunPyTestRunner', 'UnsupportedPythonError', '__all__', '__builtins__', '__cached__', '__doc__',
 '__file__', '__loader__', '__minimum_python_version__', '__name__', '__package__', '__path__',
 '__spec__', '__version__', '_init_log', 'builtins', 'config', 'extern', 'load_config', 'log',
 'logging', 'os', 'print_config', 'self_test', 'sys', 'system_info', 'tests', 'util', 'version']
>>> sunpy.system_info()
==============================
SunPy Installation Information
==============================

#######
General
#######
Time : Monday, 09. September 2019 07:14PM UT
System : Linux
Processor : x86_64
Arch : 64bit
SunPy : 1.0.3
OS: Fedora 30 Thirty (Linux 5.2.11-200.fc30.x86_64 x86_64)


##################
Required Libraries
##################
Python: 3.7.4
NumPy: 1.16.4
SciPy: 1.3.1
matplotlib: 3.0.3
Astropy: 3.2.1
Pandas: 0.25.1
parfive: 1.0.0


#####################
Recommended Libraries
#####################
beautifulsoup: NOT INSTALLED
PyQt4: NOT INSTALLED
PyQt5: 5.12.2
Zeep: NOT INSTALLED
Sqlalchemy: 1.3.7
drms: NOT INSTALLED
>>> help(sunpy)

Help on package sunpy:

NAME
    sunpy

DESCRIPTION
    SunPy
    =====
    
    An open-source Python library for Solar Physics data analysis.
    
    Web Links
    ---------
    Homepage: https://sunpy.org
    Documentation: https://docs.sunpy.org/en/stable/

PACKAGE CONTENTS
    cm (package)
    compiler_version
    conftest
    coordinates (package)
    data (package)
    database (package)
    extern (package)
    image (package)
    instr (package)
    io (package)
    map (package)
    net (package)
    physics (package)
    roi (package)
    sun (package)
    tests (package)
    time (package)
    timeseries (package)
    util (package)
    version
    visualization (package)
... 

Let's install zeep, beautifulsoup4 and drms python packages:

[mythcat@desk ~]$ pip3 install zeep --user
Collecting zeep
...
Successfully installed appdirs-1.4.3 cached-property-1.5.1 isodate-0.6.0 lxml-4.4.1
 requests-toolbelt-0.9.1 zeep-3.4.0
[mythcat@desk ~]$ pip3 install --upgrade beautifulsoup4 --user
Collecting beautifulsoup4
...
Successfully installed beautifulsoup4-4.8.0 soupsieve-1.9.3
[mythcat@desk ~]$ pip3 install --upgrade drms --user
Collecting drms
...
Successfully installed drms-0.5.7

Now, we can see examples with this python package.
First, I will use the AIA_171_IMAGE image:

>>> from sunpy.data.sample import AIA_171_IMAGE 
Files Downloaded: 100%|███████████████████████| 26/26 [00:04<00:00 5.50file="" s="">>> import sunpy.map                                                            
>>> aiamap = sunpy.map.Map(AIA_171_IMAGE)
>>> aiamap.peek()                                                               
Attribute Qt::AA_EnableHighDpiScaling must be set before QCoreApplication is created.                                                                           

** (python3:4152): WARNING **: 22:53:15.329: AT-SPI: Could not obtain desktop path or name


** (python3:4152): WARNING **: 22:53:15.377: atk-bridge: GetRegisteredEvents returned message with unknown signature

Python 3.7.3 : Using the flask - part 018.

In this tutorial, I will show you how to fix auto increment in Flask SQLAlchemy.
The old source code for the user model from the server.py was this:

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True)
    password = db.Column(db.String(120), unique=True)
    email = db.Column(db.String(120), unique=True)
    gender = db.Column(db.String(5), unique=True)
    work = db.Column(db.String(33), unique=True)
    city = db.Column(db.String(15), unique=True)

The server.sqlite will be this:

[mythcat@desk my_flask]$ sqlite3 server.sqlite 
SQLite version 3.26.0 2018-12-01 12:34:55
Enter ".help" for usage hints.
sqlite> .schema
CREATE TABLE user (
 id INTEGER NOT NULL, 
 username VARCHAR(80), 
 password VARCHAR(120), 
 email VARCHAR(120), 
 gender VARCHAR(5), 
 work VARCHAR(33), 
 city VARCHAR(15), 
 PRIMARY KEY (id), 
 UNIQUE (username), 
 UNIQUE (password), 
 UNIQUE (email), 
 UNIQUE (gender), 
 UNIQUE (work), 
 UNIQUE (city)
);
CREATE TABLE alembic_version (
 version_num VARCHAR(32) NOT NULL, 
 CONSTRAINT alembic_version_pkc PRIMARY KEY (version_num)
);
CREATE TABLE sqlite_stat1(tbl,idx,stat);
sqlite> ^Z 

If you want to change the id into auto increment then you need to follow this steps:

class User(db.Model):
    __tablename__ = 'user'
    __table_args__ = {'sqlite_autoincrement': True}
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True)
    password = db.Column(db.String(120), unique=True)
    email = db.Column(db.String(120), unique=True)
    gender = db.Column(db.String(5), unique=True)
    work = db.Column(db.String(33), unique=True)
    city = db.Column(db.String(15), unique=True)

Delete the server.sqlite file or rename it.
Open python3 and create a new server.sqlite file:

[mythcat@desk my_flask]$ python3
Python 3.7.4 (default, Jul  9 2019, 16:32:37) 
[GCC 9.1.1 20190503 (Red Hat 9.1.1-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from server import db
>>> db.create_all()
>>> db.engine.table_names()
['sqlite_sequence', 'user']
>>> 
[5]+  Stopat                  python3 

Open the new file to see the changes:

[mythcat@desk my_flask]$ sqlite3 server.sqlite 
SQLite version 3.26.0 2018-12-01 12:34:55
Enter ".help" for usage hints.
sqlite> .schema
CREATE TABLE user (
 id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, 
 username VARCHAR(80), 
 password VARCHAR(120), 
 email VARCHAR(120), 
 gender VARCHAR(5), 
 work VARCHAR(33), 
 city VARCHAR(15), 
 UNIQUE (username), 
 UNIQUE (password), 
 UNIQUE (email), 
 UNIQUE (gender), 
 UNIQUE (work), 
 UNIQUE (city)
);
CREATE TABLE sqlite_sequence(name,seq);
sqlite>  

Python 3.7.4 : Create an Stand Alone Executable on Fedora distro.

In this tutorial I will show you how to create an Stand Alone Executable with Python version 3.7.4 and Fedora 30 distro.
First you need to install using the dnf tool the python3 package.
You can test it easy with this command:

[mythcat@desk dist]$ python3
Python 3.7.4 (default, Jul  9 2019, 16:32:37) 
[GCC 9.1.1 20190503 (Red Hat 9.1.1-1)] on linux
Type "help", "copyright", "credits" or "license" for more information. 

I created a simple python script named test.py for testing:

import os
import sys
print("Hello!")

You need to install the pyinstaller python module.
Let's see this step with the output:

[mythcat@desk ~]$ pip3 install pyinstaller --user

Now you can use this python module to create Stand Alone Executable.

[mythcat@desk ~]$ pip3 install pyinstaller --user
Requirement already satisfied: pyinstaller in ./.local/lib/python3.7/site-packages (3.5)
Requirement already satisfied: setuptools in /usr/lib/python3.7/site-packages (from pyinstaller) (40.8.0)
Requirement already satisfied: altgraph in ./.local/lib/python3.7/site-packages (from pyinstaller) (0.16.1)
[mythcat@desk ~]$ pyinstaller --onefile test.py
561 INFO: PyInstaller: 3.5
561 INFO: Python: 3.7.4
571 INFO: Platform: Linux-5.2.9-200.fc30.x86_64-x86_64-with-fedora-30-Thirty
573 INFO: wrote /home/mythcat/test.spec
596 INFO: UPX is not available.
598 INFO: Extending PYTHONPATH with paths
['/home/mythcat', '/home/mythcat']
598 INFO: checking Analysis
624 INFO: Building because /home/mythcat/test.py changed
624 INFO: Initializing module dependency graph...
640 INFO: Initializing module graph hooks...
678 INFO: Analyzing base_library.zip ...
5247 INFO: running Analysis Analysis-00.toc
5352 INFO: Caching module hooks...
5376 INFO: Analyzing /home/mythcat/test.py
5396 INFO: Loading module hooks...
5397 INFO: Loading module hook "hook-xml.py"...
5775 INFO: Loading module hook "hook-pydoc.py"...
5800 INFO: Loading module hook "hook-encodings.py"...
5892 INFO: Looking for ctypes DLLs
5893 INFO: Analyzing run-time hooks ...
5901 INFO: Looking for dynamic libraries
6507 INFO: Looking for eggs
6507 INFO: Using Python library /lib64/libpython3.7m.so.1.0
6514 INFO: Warnings written to /home/mythcat/build/test/warn-test.txt
6547 INFO: Graph cross-reference written to /home/mythcat/build/test/xref-test.html
6604 INFO: checking PYZ
6607 INFO: Building because toc changed
6607 INFO: Building PYZ (ZlibArchive) /home/mythcat/build/test/PYZ-00.pyz
7030 INFO: Building PYZ (ZlibArchive) /home/mythcat/build/test/PYZ-00.pyz completed successfully.
7034 INFO: checking PKG
7035 INFO: Building because toc changed
7035 INFO: Building PKG (CArchive) PKG-00.pkg
10033 INFO: Building PKG (CArchive) PKG-00.pkg completed successfully.
10036 INFO: Bootloader 
/home/mythcat/.local/lib/python3.7/site-packages/PyInstaller/bootloader/Linux-64bit/run
10036 INFO: checking EXE
10123 INFO: Building because toc changed
10124 INFO: Building EXE from EXE-00.toc
10163 INFO: Appending archive to ELF section in EXE /home/mythcat/dist/test
10337 INFO: Building EXE from EXE-00.toc completed successfully.

This command will create some folders: dist, build, ...
The dist folder will have the Stand Alone Executable named test:

[mythcat@desk ~]$ cd dist/
[mythcat@desk dist]$ ls
test
[mythcat@desk dist]$ ./test
Hello!