Conversing with Python

Before you can converse with Python, you must first install the Python software on your computer and learn how to start Python on your computer. That is too much detail for this chapter so I suggest that you consult www.pythonlearn.com where I have detailed instructions and screen-casts of setting up and starting Python on Macintosh and Windows systems. At some point, you will be in a terminal or command window and you will type python and the Python interpreter will start executing in interactive mode: and appear somewhat as follows:

Python 2.6.1 (r261:67515, Jun 24 2010, 21:47:49)

[GCC 4.2.1 (Apple Inc. build 5646)] on darwin

Type "help", "copyright", "credits" or "license" for more information.

>>>

The >>> prompt is the Python interpreter’s way of asking you, “What do you want me to do next?”. Python is ready to have a conversation with you. All you have to know is how to speak the Python language and you can have a conversation.

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Special Permissions in linux

The setuid permission on an executable file means that the command will run as the user owning the file, not as the user that ran the command. One example is the passwd command: [student@desktopX ~]$ ls -l /usr/bin/passwd -rw s r-xr-x. 1 root root 35504 Jul 16 2010 /usr/bin/passwd In a long listing, you can spot the setuid permissions by a lowercase s where you would normally expect the x (owner execute permissions) to be. If the owner does not have execute permissions, this will be replaced by an uppercase S . The special permission setgid on a directory means that files created in the directory will inherit their group ownership from the directory, rather than inheriting it from the creating user. This is commonly used on group collaborative directories to automatically change a file from the default private group to the shared group, or if files in a directory should be

The Seven-Step Model of Migration

Irrespective of the migration approach adopted, the Seven-step Model of Cloud Migration creates a more rational point of view towards the migration process and offers the ability to imbibe several best practices throughout the journey Step 1: Assess Cloud migration assessments are conducted to understand the complexities in the migration process at the code, design and architectural levels. The investment and the recurring costs are also evaluated along with gauging the tools, test cases, functionalities and other features related to the configuration. Step 2: Isolate The applications to be migrated to the cloud from the internal data center are freed of dependencies pertaining to the environment and the existing system. This step cuts a clearer picture about the complexity of the migration process. Step 3: Map Most organisations hold a detailed mapping of their environment with all the systems and applications. This information can be used to distinguish between the

RequestsDependencyWarning: urllib3 (1.24.1) or chardet (3.0.4) doesn't match a supported version

import tweepy /usr/lib/python2.7/dist-packages/requests/__init__.py:80: RequestsDependencyWarning: urllib3 (1.24.1) or chardet (3.0.4) doesn't match a supported version! RequestsDependencyWarning) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python2.7/dist-packages/tweepy/__init__.py", line 14, in <module> from tweepy.api import API File "/usr/local/lib/python2.7/dist-packages/tweepy/api.py", line 12, in <module> from tweepy.binder import bind_api File "/usr/local/lib/python2.7/dist-packages/tweepy/binder.py", line 11, in <module> import requests File "/usr/lib/python2.7/dist-packages/requests/__init__.py", line 97, in <module> from . import utils File "/usr/lib/python2.7/dist-packages/requests/utils.py", line 26, in <module> from ._internal_utils import to_native_string File "/usr/lib/python2.

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