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Add by Zhj: Several articles from the author refer to a few articles in RABBITMQ's tutorials. Original: http://www.01happy.com/python-pika-rabbitmq-summary/This period of time to learn the next RABBITMQ, in the course of learning, found that the domestic use of Python Pika library RABBITMQ information is very few, the official website has this information, but all English. So the author combined with their
Examples of the chr unichr ord function in python, unichrord
Examples of the chr unichr ord function in python
The chr () function uses a range (0 to 256 ~ 255) an integer is used as a parameter and a corresponding character is returned. Unichr () is the same as it, but only returns Unicode characters. The parameter ra
Http://www.cnblogs.com/batteryhp/p/4868348.htmlChapter I preparatory workStarting today the book-"Data analysis using Python". Both R and Python have to be used, which is the reason for the code book. First, according to the book said to install, Google downloaded Epd_free-7.3-1-win-x86.msi, the translator proposed to follow the author's version of the installation, epdfree including Numpy,scipy,matplotlib,
The example in this article describes the closure usage in Python. Share to everyone for your reference. The specific analysis is as follows:
What is a closure package?
Simply put, closures are based on different configuration information to get different results
Let's take a look at the professional explanation: Closures (Closure) are short for lexical closures (Lexical Closure) and are functions that reference free variables. This quoted free varia
The examples in this article describe the parameter definitions and variable parameter usages of functions in Python. Share to everyone for your reference. Specifically as follows:
When learning to use Python, especially when looking at some library source code, often see Func (*args, **kwargs) Such a function definition, this * and * * is a bit confus
function, the TypeError error is reported and an error message is given: STR is the wrong parameter type:
>>> ABS (' a ')
Traceback (most recent call last):
File "
and comparison function cmp (x, y) requires two parameters, if x
>>> CMP (1, 2)
-1
>>> CMP (2, 1)
1
>>> cmp (3, 3)
0
Data type conversions
The common functions built into Python include data type conversion functions, such as the Int () function to convert oth
"//" operationThe division operator is "/", which is known to all, but the result of this two-dollar operator "/" is determined by the operand itself.20/3620/3.06.66666666666666720.0/36.66666666666666720.0/3.06.666666666666667When using the "/" operator, as long as an operand is a floating-point number, the result is a floating-point result, which we call the true divide, but if the two operands are integers, then the result is an integer number of decimal digits, which we call division. But if
The main use of two libraries, Urllib and BeautifulSoup.The function is to parse out the query words and specific explanations of the dream from the HTML.1 #-*-coding:utf-8-*-2 ImportUrllib, Urllib23 ImportTime , Random4 fromBeautifulSoupImportBeautifulSoup5 6 defFetchurl (str_url):7 8User_agent ='mozilla/5.0 (Windows NT 6.1; WOW64)9 applewebkit/537.36 (khtml, like Gecko)'TenValues = {} Oneheaders = {'user-agent': User_agent} Adata =Urllib.urlencode (values) - -Content ="' the - Try:
Examples of common dict operations in python, pythondict
This example summarizes the common operations for dictionary dict in python. Share it with you for your reference. The details are as follows:
The following python code demonstrates the common operations of dictionaries in
This article mainly introduced the Python queue definition and use method, combined with the concrete instance form analysis Python definition and the use queue's concrete operation skill and the attention matter, needs the friend can refer to the next
The examples in this article describe the definition and use of Python
)
If the number of arguments passed in is correct, but the parameter type cannot be accepted by the function, the TypeError error is reported, and an error message is given: STR is the wrong parameter type:
>>> ABS (' a ') Traceback (most recent call last): File "
", line 1, in
Typeerror:bad oper and type for abs (): ' str '
The comparison function cmp (x, y) requires two parameters, if x
y, returns 1:
>>> CMP (1, 2) -1>>> CMP (2, 1)
Python programming-detailed description of string-related operation examples, pythonstring
This article describes the string-related operations for Python programming. We will share this with you for your reference. The details are as follows:
# Coding = utf8''' string is the most common type in Python. You can create
Examples of Python callback function usage
This example describes the usage of the Python callback function. Share it with you for your reference. The specific analysis is as follows:
I. Baidu encyclopedia's explanation of callback functions:
A callback function is a function called by a function pointer. If you pass the pointer (address) of a function as a param
This article mainly introduced the python variable parameter *args and **kwargs usage, combined with the example form summarizes the variable parameter *args and the **kwargs function, the difference and the specific use skill in Python, the need friend can refer to the next
The examples in this article describe python
the result is a list containing a dictionary, if you want to get "Gakki" is aaa[1][' name ']If you want to copy and reference, then use and *, for example, change Test.yaml to this:Name: name gakkiwife: *nameThe effect of performing test.py is as follows:[[email protected] chentest]# python test.py {' name ': ' Gakki ', ' wife ': ' Gakki '} in the same Yaml file, you can use --- to fragment so that multiple documents can be written in one file:
Python instance
It's always a little confusing to look at the concept, so just look at a few Python examples.
Example 1
def make_adder (addend):def adder (augend):return augend + addendReturn adder
p = Make_adder (23)Q = Make_adder (44)
Print P (100)Print Q (100)Run Result:
123144Analyze:
We found that the Make_adder is a function, including a parameter ad
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