Python Programming Training Classes in Arlington, Virginia

Training Suggestions from the Experts

An Experienced Python developer must have

... an understanding of the following topics:  Map, Reduce and Filter, Numpy, Pandas, MatplotLib, File handling and Database integration.  All of these requirements assume a solid grasp of Python Idioms that include iterators, enumerators, generators and list comprehensions.  

To quickly get up to speed, we suggest you enroll in the following classes: Beginning Python and Advanced Python 3

Call for Details: 303.377.6176

Learn Python Programming in Arlington, Virginia and surrounding areas via our hands-on, expert led courses. All of our classes either are offered on an onsite, online or public instructor led basis. Here is a list of our current Python Programming related training offerings in Arlington, Virginia: Python Programming Training

We offer private customized training for groups of 3 or more attendees.
Arlington  Upcoming Instructor Led Online and Public Python Programming Training Classes
Python for Scientists Training/Class 4 August, 2025 - 8 August, 2025 $2090
HSG Training Center instructor led online
Arlington, Virginia 22201
Hartmann Software Group Training Registration

Python Programming Training Catalog

cost: $ 1290length: 3 day(s)
cost: $ 1190length: 3 day(s)
cost: $ 1290length: 4 day(s)
cost: $ 1190length: 3 day(s)
cost: $ 1190length: 3 day(s)
cost: $ 1290length: 4 day(s)
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cost: $ 2090length: 5 day(s)
cost: $ 1290length: 4 day(s)
cost: $ 790length: 2 day(s)
cost: $ 1290length: 4 day(s)

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Blog Entries publications that: entertain, make you think, offer insight

Checking to see if a file exists is a two step process in Python. Simply import the module shown below and invoke the isfile function:

 

import os.path
os.path.isfile(fname)

When businesses are trying to expand and require professionals to lead teams, terminology may get in the way of who performs what roles. When it comes to information technology (IT), new and vital professionals may seem hard to differentiate between one another. However, there are key differences between specific professionals needed with IT departments. Here are the responsibilities that differentiate between an IT manager and an IT project manager.

IT Managers

IT managers are the leaders of the entire IT infrastructure a business has to function properly. The IT manager must lead the entire IT department to regulate and maintain the IT network for the business. As a manager, this IT professional corresponds with other departments in the business about how the IT department is implementing the goals the business is aiming toward. In addition, the manager must be fiscally responsible and answer to executives and financial officers in the business the reasons behind certain costs and investments. Because of the dual computer technology and business acumen this profession requires, many IT managers have a Master of Business Administration (MBA) related to information technology.

IT Project Managers

Millions of people experienced the frustration and failures of the Obamacare website when it first launched. Because the code for the back end is not open source, the exact technicalities of the initial failings are tricky to determine. Many curious programmers and web designers have had time to examine the open source coding on the front end, however, leading to reasonable conclusions about the nature of the overall difficulties.

Lack of End to End Collaboration
The website was developed with multiple contractors for the front-end and back-end functions. The site also needed to be integrated with insurance companies, IRS servers, Homeland Security servers, and the Department of Veterans Affairs, all of whom had their own legacy systems. The large number of parties involved and the complex nature of the various components naturally complicated the testing and integration of each portion of the project.

The errors displayed, and occasionally the lack thereof, indicated an absence of coordination between the parties developing the separate components. A failed sign up attempt, for instance, often resulted in a page that displayed the header but had no content or failure message. A look at end user requests revealed that the database was unavailable. Clearly, the coding for the front end did not include errors for failures on the back end.

Bloat and the Abundance of Minor Issues
Obviously, numerous bugs were also an issue. The system required users to create passwords that included numbers, for example, but failed to disclose that on the form and in subsequent failure messages, leaving users baffled. In another issue, one of the pages intended to ask users to please wait or call instead, but the message and the phone information were accidentally commented out in the code.

While the front-end design has been cleared of blame for the most serious failures, bloat in the code did contribute to the early difficulties users experienced. The site design was heavy with Javascript and CSS files, and it was peppered with small coding errors that became particularly troublesome when users faced bottlenecks in traffic. Frequent typos throughout the code proved to be an additional embarrassment and were another indication of a troubled development process.

NoSQL Database
The NoSQL database is intended to allow for scalability and flexibility in the architecture of projects that will use it. This made NoSQL a logical choice for the health insurance exchange website. The newness of the technology, however, means personnel with expertise can be elusive. Database-related missteps were more likely the result of a lack of experienced administrators than with the technology itself. The choice of the NoSQL database was thus another complication in the development, but did not itself cause the failures.

Another factor of consequence is that the website was built with both agile and waterfall methodology elements. With agile methods for the front end and the waterfall methodology for the back end, streamlining was naturally going to suffer further difficulties. The disparate contractors, varied methods of software development, and an unrealistically short project time line all contributed to the coding failures of the website.

I will begin our blog on Java Tutorial with an incredibly important aspect of java development:  memory management.  The importance of this topic should not be minimized as an application's performance and footprint size are at stake.

From the outset, the Java Virtual Machine (JVM) manages memory via a mechanism known as Garbage Collection (GC).  The Garbage collector

  • Manages the heap memory.   All obects are stored on the heap; therefore, all objects are managed.  The keyword, new, allocates the requisite memory to instantiate an object and places the newly allocated memory on the heap.  This object is marked as live until it is no longer being reference.
  • Deallocates or reclaims those objects that are no longer being referened. 
  • Traditionally, employs a Mark and Sweep algorithm.  In the mark phase, the collector identifies which objects are still alive.  The sweep phase identifies objects that are no longer alive.
  • Deallocates the memory of objects that are not marked as live.
  • Is automatically run by the JVM and not explicitely called by the Java developer.  Unlike languages such as C++, the Java developer has no explict control over memory management.
  • Does not manage the stack.  Local primitive types and local object references are not managed by the GC.

So if the Java developer has no control over memory management, why even worry about the GC?  It turns out that memory management is an integral part of an application's performance, all things being equal.  The more memory that is required for the application to run, the greater the likelihood that computational efficiency suffers. To that end, the developer has to take into account the amount of memory being allocated when writing code.  This translates into the amount of heap memory being consumed.

Memory is split into two types:  stack and heap.  Stack memory is memory set aside for a thread of execution e.g. a function.  When a function is called, a block of memory is reserved for those variables local to the function, provided that they are either a type of Java primitive or an object reference.  Upon runtime completion of the function call, the reserved memory block is now available for the next thread of execution.  Heap memory, on the otherhand, is dynamically allocated.  That is, there is no set pattern for allocating or deallocating this memory.  Therefore, keeping track or managing this type of memory is a complicated process. In Java, such memory is allocated when instantiating an object:

String s = new String();  // new operator being employed
String m = "A String";    /* object instantiated by the JVM and then being set to a value.  The JVM
calls the new operator */

Tech Life in Virginia

Virginia is known as "the birthplace of a nation,” is nicknamed the "Old Dominion" and has had 3 capital cities, Jamestown, Williamsburg, and Richmond. The state motto is "Sic Semper Tyrannis"…“Thus always to tyrants” More people work for the U.S. government than any other industry in this region. Virginia's largest private employer is also the world's largest ship building yard. Because the state hosts some major Net firms such as AOL, Network Solutions, and MCI WorldCom it has dubbed itself the "Internet Capital of the world".
They say a year in the Internet business is like a dog year.. equivalent to seven years in a regular person's life. In other words, it's evolving fast and faster. Vint Cerf, Chief Internet Evangelist for Google
other Learning Options
Software developers near Arlington have ample opportunities to meet like minded techie individuals, collaborate and expend their career choices by participating in Meet-Up Groups. The following is a list of Technology Groups in the area.
Fortune 500 and 1000 companies in Virginia that offer opportunities for Python Programming developers
Company Name City Industry Secondary Industry
Brink's Inc. Richmond Business Services Security Services
Federal Home Loan Mortgage Corporation (Freddie Mac) Mc Lean Financial Services Lending and Mortgage
General Dynamics Corporation Falls Church Manufacturing Aerospace and Defense
CarMax, Inc. Henrico Retail Automobile Dealers
NVR, Inc. Reston Real Estate and Construction Construction and Remodeling
Gannett Co., Inc. Mc Lean Media and Entertainment Newspapers, Books and Periodicals
Smithfield Foods, Inc. Smithfield Manufacturing Food and Dairy Product Manufacturing and Packaging
ManTech International Corporation Fairfax Computers and Electronics IT and Network Services and Support
DynCorp International Falls Church Manufacturing Aerospace and Defense
Genworth Financial, Inc. Richmond Financial Services Insurance and Risk Management
MeadWestvaco Corporation Richmond Manufacturing Paper and Paper Products
Dollar Tree, Inc. Chesapeake Retail Department Stores
Alpha Natural Resources, Inc. Abingdon Agriculture and Mining Mining and Quarrying
SRA International, Inc. Fairfax Business Services Business Services Other
NII Holdings, Inc. Reston Telecommunications Wireless and Mobile
Dominion Resources, Inc. Richmond Energy and Utilities Gas and Electric Utilities
Norfolk Southern Corporation Norfolk Transportation and Storage Freight Hauling (Rail and Truck)
CACI International Inc. Arlington Software and Internet Data Analytics, Management and Storage
Amerigroup Corporation Virginia Beach Financial Services Insurance and Risk Management
Owens and Minor, Inc. Mechanicsville Healthcare, Pharmaceuticals and Biotech Personal Health Care Products
Advance Auto Parts, Inc Roanoke Retail Automobile Parts Stores
SAIC Mc Lean Software and Internet Software
AES Corporation Arlington Energy and Utilities Gas and Electric Utilities
Capital One Financial Corporation Mc Lean Financial Services Credit Cards and Related Services
Sunrise Senior Living, Inc. Mc Lean Healthcare, Pharmaceuticals and Biotech Residential and Long-Term Care Facilities
Computer Sciences Corporation Falls Church Software and Internet Software
Altria Group, Inc. Richmond Manufacturing Manufacturing Other
Northrop Grumman Corporation Falls Church Manufacturing Aerospace and Defense
Alliant Techsystems Inc. Arlington Manufacturing Aerospace and Defense
Markel Corporation Glen Allen Financial Services Insurance and Risk Management

training details locations, tags and why hsg

A successful career as a software developer or other IT professional requires a solid understanding of software development processes, design patterns, enterprise application architectures, web services, security, networking and much more. The progression from novice to expert can be a daunting endeavor; this is especially true when traversing the learning curve without expert guidance. A common experience is that too much time and money is wasted on a career plan or application due to misinformation.

The Hartmann Software Group understands these issues and addresses them and others during any training engagement. Although no IT educational institution can guarantee career or application development success, HSG can get you closer to your goals at a far faster rate than self paced learning and, arguably, than the competition. Here are the reasons why we are so successful at teaching:

  • Learn from the experts.
    1. We have provided software development and other IT related training to many major corporations in Virginia since 2002.
    2. Our educators have years of consulting and training experience; moreover, we require each trainer to have cross-discipline expertise i.e. be Java and .NET experts so that you get a broad understanding of how industry wide experts work and think.
  • Discover tips and tricks about Python Programming programming
  • Get your questions answered by easy to follow, organized Python Programming experts
  • Get up to speed with vital Python Programming programming tools
  • Save on travel expenses by learning right from your desk or home office. Enroll in an online instructor led class. Nearly all of our classes are offered in this way.
  • Prepare to hit the ground running for a new job or a new position
  • See the big picture and have the instructor fill in the gaps
  • We teach with sophisticated learning tools and provide excellent supporting course material
  • Books and course material are provided in advance
  • Get a book of your choice from the HSG Store as a gift from us when you register for a class
  • Gain a lot of practical skills in a short amount of time
  • We teach what we know…software
  • We care…
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Interesting Reads Take a class with us and receive a book of your choosing for 50% off MSRP.