First, install the XLRD
Address
After downloading, use the pip install .whl installation as well.
View Help:
>>> Import xlrd>>> Help (XLRD) to the Xlrd:name xlrdpackage CONTENTS biffh book CompDoc Formatt ING Formula Info licences sheet TimeMachine xldate xlsxfunctions count_records (filename, outfile=
The above method can be used to view the XLRD help information, there are some modules in the XLRD package, as well as some member variables, constants, functions.
Second,
The sequential table is the sequential storage structure of the linear table. It stores data in a linear table through a set of contiguous storage units, and adjacent two elements are also adjacent to each other in physical locations. For example, the 1th element is stored in the starting position of the linear Table l
the unique value of A, the number of occurrences (a, b) of the unique value of statistics = (1,3) c appears 1 times (A, B) = (2,4) appears 3 times - the Print(Pd.crosstab (df['A'],df['B'],normalize=true))#display in a frequency-based manner - Print('--------') - Print(Pd.crosstab (df['A'],df['B'],values=df['C'],aggfunc=np.sum))#values: A value array based on a factor aggregation - #Aggfunc: If the values array is not passed, the frequency table is c
Python has both the flexibility of scripting language, and rich library and object-oriented features, it is very convenient to develop.Game rules and table tennis, if the frog seeds dropped on the ground even if you lose, you can use the blue seesaw to play it, so that he does not fall to the ground, game over can press any key to continue the game or opt out;Paste the following code into your idle, find th
#! /usr/bin/env python#coding =utf-8s = "{0} x {1}={2}"For I in range (1,10):Print ""For J in Range (1,i+1):print S.format (i,j,i*j), Results:1 x 1=12 x 1=2 2 x 2=43 x 1=3 3 x 2=6 3 x 3=94 x 1=4 4 x 2=8 4 x 3=12 4 x 4=165 x 1=5 5 x 2=10 5 x 3=15 5 x 4=20 5 x 5=256 x 1=6 6 x 2=12 6 x 3=18 6 x 4=24 6 x 5=30 6 x 6=367 x 1=7 7 x 2=14 7 x 3=21 7 x 4=28 7 x 5=35 7 x 6=42 7 x 7=498 x 1=8 8 x 2=16 8 x 3=24 8 x 4=32 8 x 5=40 8 x 6=48 8 x 7=56 8
Definition of linked list:A linked list is a data structure composed of a group of data elements called nodes. Each node contains information about the node and the address pointing to the next node. Since each node contains URL Information, a variable can be used to access the entire node sequence. That is to say, a node contains two parts of information: one is used to store the value of the data element, which is called the information field, and the other is used to store the pointer of the
This article mainly introduces the Python xlsxwriter module to create a aexcel form, has a certain reference value, now share to everyone, the need for friends can refer to
Installation using PIP install Xlsxwriter to install, Xlsxwriter used to create Excel table, the function is very powerful, the following details:
1. Simply use an instance of Excel:
#coding: Utf-8import xlsxwriterworkbook = Xlsxwriter
When learning scripts, you will often be asked if you would write a 99 multiplication table, and now simply write a multiplication table with a Python statement[email protected] python_py]# Cat While3.pyi = 1while (iTest:[[emailprotected]python_py]#pythonwhile3.py1x1=1 1x2=22x2=41x3= 32x3=63x3=91x4= 42x4=83x4=124x4= 161x5=52x5=103x5 =154x5=205x5=251x 6=62x6=123x6
corresponding column can be taken out as neededThe basic code is as follows:All_data=browser.find_elements (By.xpath,"//label[@class = ' current ']")#Select all date element pairs likeRowall=[rowall.text forRowallinchAll_data]#take out the corresponding date elementrowindex=[rowall.index (i) forIinchRowallifU'Saturday' inchI#Get column" "determine if Saturday can be scheduled, no 2s refresh" " whileTrue:tds=browser.find_elements (By.xpath,"//tbody[@id = ' timeline ']/tr/td[%d]"% (rowindex[0]+1)
the extra space in front of the output of the corresponding number of spaces, in Python can not directly write print ("") statement to indicate the output space, you must add the end keyword, Represents the output ending with the right side of the equal sign, similar to the difference between the upper right and upper left of the following.4. Lower left TriangleCode:1 #左下三角格式输出九九乘法表2 for I in Range (1,10): 3 for J in Range (1,i+1): 4 prin
The following code python2.7 is available.#encoding =utf8#author:walker#date:2014-09-16#function: Gets the field name of the specified table in the Access file import win32com.clientif __name__ = = ' _ _main__ ': Accesspathfile = R ' D:\tmp\xxx.mdb ' conn = Win32com.client.Dispatch (R ' ADODB. Connection ') DSN = ' provider=microsoft.ace.oledb.12.0;data source= ' + accesspathfile + '; ' Conn. Open (DSN) rs = Win32com.client.Dispatch (R ' ADODB. Record
First, this is Python.For I in range (1): print ("". Join (["%d*%d=%d"% (j, I, I*j) for J in range (1, i+1)]))DetailedFor I in range (1): #当i = = 1 O'Clock: print ("". Join (["%d*%d=%d"% (j, I, I*j) for J in range (1, i+1)])) a ["%d*%d=%d" % (J, I, I*j)] is said to be the first J [J for J in Range] B for J in range (1, i + 1)--When I==1, is J gets 1, if it is 2,j for the C so a 1*1=1 “ ”。 Join 2*1 =2Using the Python list derivation to ma
Copy codeThe Code is as follows:#! /Usr/bin/env python# Coding = UTF-8# Implement a hash table (linear address and then hash)
Def ChangeKey (key, m, di ):Key01 = (key + di) % mReturn key01
A = raw_input ("Please entry the numbers: \ n"). split ()M = len ()Dict01 = {}For I in:Key = int (I) % mIf "% s" % key in dict01:NewKey = ChangeKey (key, m, 1)While "% s" % NewKey in dict01: # because the following dict
1.#99乘法表#第一种for i in range (1,10): s= "for J in Range (1,i+1): s+=str (j) + ' * ' +str (i) + ' = ' +str (j*i) + ' \ t ' print S#第二种For I in Range (1,10):S= "For j in Range (1,i+1):S+=str (j) + ' * ' +str (i) + ' = ' + ' {0:2d} '. Format (j*i) + ' \ t ' #{0:2d} Explanation: Indicates that 0 represents j*i,:2d represents two width of 10 binary number displayPrint S 2. #1-100 prime number num = 2cont = 0while num 3. #m =1*2*3*4*...N m for a maximum nm of not greater than 20000 =
Print 99 multiplication tableFor Loop statement implementation:For I in Range (1,10): A for J in range (1,10): print (J, "X", I, "=", i*j, "\ T", end= "") #因为print自动换行, end= "" ending with no newline if i==j: print ("") #此处是结尾换行 breakWhile loop statement implementation:I=0j=0while i Output Result:1 x 1 = 1 1 x 2 = 2 2 x 2 = 4 1 x 3 = 3 2 x 3 = 6 3 x 3 = 9 1 x 4 = 4 2 x 4 = 8 x 3 = 4 x 4 = 4 1 x 5 = 5 3 x 5 = 4 x 5 = 5 x 5 = 1 x 6 = 6 2 x 6 = 3 x 6 = 4 x
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