Baptism soul, practice python (2) -- python installation and configuration, python -- python
Install python and basic configurations:
Python Official Website: www.python.org
Open the website and download the corresponding version
Python learning notes-python program running, python-python
I am a beginner in python and write down some of my ideas. Please ignore it.
Install the python editor and configure the environment (see install and configure
()
Other cluster tools
Using less RAM
IPython #memit
Array module
Dawg/dafsa
Marisa Trie (Static tree)
Datrie (need an alphabet to contain all the keys?) )
HAT trie
HTTP microservices (using flask): https://github.com/j4mie/postcodeserver/
Probabilistic Data Structures
hyperloglog++ structure?
Very Approximate counting with a 1-byte Morris Counter
2^exponent, updating using pro
Python installation (under Windows platform)1. Download the installation package: https://www.Python.org/downloads/2. Default installation path: C:\Python2.73. Configure the variable environment:Right-computer→ properties → advanced system settings → advanced → environment variables → in the second content box find a row of the variable named path, double-click the →python installation directory to append t
would overflow (such as the above-mentioned number above 232), but there was no such error since Python2.2.>>> 9999 * *8"" inDouble-precision floating-point numberFloating-point numbers in Python are similar to the double type in the C language, and are two-precision floating-point numbers that can be represented by a direct decimal or scientific notation. Each floating-point number occupies 8 bytes (64 bits), fully complies with the IEEE754 number s
Digital2.7.1.1 int(integral type) on a 32-bit machine, the number of integers is 32 bits and the value range is -2**31~2**31-1, which is -2147483648~2147483647On a 64-bit system, the number of integers is 64 bits and the value range is -2**63~2**63-1, which is -9223372036854775808~92233720368547758072.7.1.2 Long(L-integer)with Unlike the C language, Python's long integers do not refer to the positioning width, that is, Python does not limit the size
. Net programmer Python path --- Python basics, python --- python
Recently, I am curious about dynamic languages. So I chose the Python language.
I. Python basics:
1. print outputs data to P
The path to python practice (2-Basic python syntax, traffic control), python-python
For Tom, it is really hard to read the code, the progress is very slow, and the mind is quite complicated, walking silently, hoping to turn persistence into a habit and learn the Code with hard work.
I. character encoding/variable
1. ch
, then I will decrypt to see:Import"migfma0gcsqgsib3dqebaquaa4gnadcbiqkbgqdc7kw8r6tq43pwapyvkj5laljan9bzb21taift /vexbobzh7q8sudp5udpxebkzojx2l28y7xs1d9v3tdpfki2lr7pazwbmdmn8rihrddnpupjnlaguqjg9oopn8j7ynpcxca1iybolc2kehmjn5uwoanqq +ca6agnkqly2h4j6widaqab"= base64.b64decode (pubkey)print b64_str print len (b64_str)Get a bunch of garbled, we convert this string garbled into 16 binaryFind the end is "\x01\x00\x01", 10001, see more RSA public key, know this number, is mostly exponent.Then look at
Python-python interpreter execution, python-python
Recently, due to the need of the company, I have been familiar with the magic language of python, which gives me the feeling that development is fast and the code is concise.
Let's start by listing the differences between th
are gradually being unified into one. Before Python 2.2, a standard integer type object that exceeded the value range would overflow (for example, the above 232 number mentioned above), but there was no such mistake since Python2.2.
Copy Code code as follows:
>>> 9999 * * 8
Traceback (most recent call last):
File "Overflowerror:integer exponentiation
Python 2.2
>>> 9999 * * 8
99920
Baptism soul, practice python (5) -- python operator, built-in function, python -- python
Previously, we mentioned the concept of BIF (built-in function). What is a built-in function? It is a function that has been defined by python. It can be used directly without being ma
The path to a Python guru [1] first understanding of python, first understanding of the path to python
Python Introduction
1: Founder of Python
Python /), it is an advanced programming language for interpreting, obj
Python learning notes-day3-python keywords, python-day3-python
1. and logic and
2. assert checks whether a condition is true. If it is false, an error is thrown.
3. The break jumps out of the for and while loop.
4. class definition
5. continue jumps out of this loop and executes the next loop.
6. def Defined Functions
Python writes, Python writes, writes Python, makes PythonI am a first-line it enterprise programmer, and now receive a variety of code to write business:
Write C language, C language, C language job generation, C language writing
Write C + +, Generation C + +, C + + job generation, C + + job writing
Write pyt
+ - * / // % 也可以使用增强的赋值操作符 += -= 注意: 同样的功能,使用增强型赋值操作符性能较好 int类型不可变7) Input/output 输出 print语句 输入 input() raw__input() print "String %format1 %format2 ..." %(variable1,varuable2,...) 简单例: >>> num = 7.8 >>> print "The num is %f and %d" % (num,2) 7.800000 2 进阶如 Example:>>> d = { ' x ' :32, ' y ' :27.490325,:65} >>> print "% (x) -10d% (y) 0.3g"%d 32 27.5 output two items, the first meaning is to take the dictionary d in the key named 1
1. Delete the reference to the object with Del>>> a = 123>>> adel a>>> atraceback (most recent call last): c4/>"" in 'a ' is Not defined2. Integral type(1) Boolean type value range as long as two values: Boolean True and Boolean value false(2) Standard integral type long integral typeThe ①python standard integer value range is -231~231-1, which is 2 147 483 648~2 147 483 648.②python Standard integral is
power exponent and fitting is only good for the middle part of the effect;3.E b/x, polynomial equation, x B-time which effect is good? Finally, I hope this article will help you, especially my students and friends who have access to data mining and machine learning. This text is mainly about fitting, recording some code snippets, as online notes, but also hope to help you. At the same time, the following paper will opensource series of articles after
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