keyword;#example.py##Example of combining text via generatorsdefsample ():yield " is" yield "Chicago" yield " not" yield "Chicago?"#(a) use Join () to simply connect them togetherText ="'. Join (sample ())Print(text)Print('======================')#(b) Redirect these fragments to I/OImportSYS forPartinchsample (): Sys.stdout.write (part) Sys.stdout.write ('\ n')Print('**************************')#(c) intelligently combine I/O operations in a mixed mannerdefCombine (source, maxsize): Par
Python cookbook (data structure and algorithm) method for saving the last N elements, pythoncookbook
This example describes how to save the last N elements in Python. We will share this with you for your reference. The details are as follows:
Problem:We hope to make a limited history statistics for the last few records during iteration or other forms of processing.
Solution:Select collections. deque.
The following code performs a simple text match on
for vertex shaders.vertex:128 instruction limit. fragment:96 instruction Limit (texture + arithmetic), temporary registers and 4 texture indirections.3.0Compiles the shader under Shader Model 3. Model 3 is more powerful and flexible than 2 but is less compatible.Vertex:no instruction limit.fragment:1024 instruction Limit (texture + arithmetic), temporary registers and 4 texture indirections.It is the possible to override these limits using #pragma profileoption directive.For example, #pragma pr
=tex2d (_maintex,in.uv_maintex); Half4 secondcolor=tex2d (_ Secondtex,in.uv_secondtex); float4 heightcolor=tex2d (_heightmap,in.uv_maintex); float redchannel=1- IN.VERTEXCOLOR.R; The vertex color R also stores the height data, 1 minus the height data stored in the height graph is the ratio of float RHEIGHT=HEIGHTCOLOR.R * REDCHANNEL; The r actual data of the height graph float invertheight=1-heightcolor.r;float finalheight= (invertheight * redchannel) *4;float finalBlend= Saturate (rheight + fin
Class and object of the 8th chapter 2016.5.38.1 Changing the object's string display __str__ and __repr__%s and%r, mentioned Eval, I didn't use it.8.2 Formatting a custom string __format__8.3 Let the object support context management, __enter__ and __exit__, you can use the WITH8.4 Ways to save memory when creating a large number of objects __slot__,__slot__ is more of a memory-optimized tool than a wrapper tool to prevent users from adding new properties to an instance.8.5 Encapsulating propert
) {fixed4 c = fixed4 (1,1,1,1); C.rgb = c * s.albed O;C.A = S.alpha;return C;}In the unlit illumination model function, no processing is done and no illumination is accepted.void Vert (inout appdata_full v,out Input o) {unity_initialize_output (input,o); Tangent_space_rotation;o.tan1=mul (ROTATION,UNITY_MATRIX_IT_MV[0].XYZ); O.tan2=mul (rotation,UNITY_MATRIX_IT_MV[1 ].XYZ);}In the vertex function, in order to correctly retrieve the spherical map, we need to multiply the tangent rotation matrix r
Surf (Input in, InOut surfaceoutput o) {half4 c = tex2d (_maintex, In.uv_maintex); O. Albedo = C.rgb;o. Alpha = C.A;} ENDCG} FallBack "Diffuse"}The book also adds a mix of colors to make the effect look more dazzling, not here.Transfer from Http://blog.csdn.net/huutu http://www.thisisgame.com.cnLearn about a function mentioned in the book LerpLerp interpolation functionfloat f = lerp (from,to,t) = from* (1-t) + to*tWhen t = 0 returns from, when t = 1 returns to. When t = 0.5 returns the mean of
(dot (o.normal,normalize (in.viewdir))), Rim=pow (Rim,_rimpower), O. Albedo = c.rgb;//So rim=0,o when the line of sight is perpendicular to the surface. Emission = 0. The closer the line of sightVertical, the smaller the reflection. O.emission= (Texcube (_CUBEMAP,IN.WORLDREFL). RGB * _reflectionamount) *rim;o. Specular=_specpower;o. Gloss=1.0;o. Alpha = C.A;} ENDCG} FallBack "Diffuse"}The code comment is already there.I drew a picture, too.The effect of the final implementationThe area where th
Smooth python and cookbook Study Notes (7), pythoncookbook1. Read and Write compressed data files
Use the gzip and bz2 modules to read and write compressed files. However, pay attention to the file mode. The default format is binary.
1 # Read the compressed file 2 import gzip 3 with gzip.open('somefile.gz ', 'rt') as f: 4 text = f. read () 5 6 import bz2 7 with bz2.open('somefile.bz2 ', 'rt') as f: 8 text = f. read () 9 10 # Write compressed data 11
Smooth python and cookbook Study Notes (6), pythoncookbook1. iterate multiple sequences at the same time (zip (function ))
You can use the zip () function to iterate multiple sequences at the same time.
>>> X = [1, 2, 3, 4, 5, 6]>>> Y = [121, 223, 116, 666, 919, 2333]>>> for x, y in zip(X, Y):... print(x, y)...1 1212 2233 1164 6665 9196 2333
Zip (a, B) is used to create an iterator that generates tuples (x, y), x is taken from sequence a, and y is
Framework Framework specification. If X. Equals (y), then X. GetHashCode () and Y. GetHashCode () should return the same value, which in turn is not required (if X. GetHashCode () and Y. GetHashCode () returns the same value, X. Equals (y) can return false), and X and Y can also share a hash code when they are not equal. In our entity base class, we simply use the hash code value of the ID.Supplemental knowledgeFor more knowledge about equals and GetHashCode, see the MSDN documentation for Http
The n elements are decomposed from an iterative object, but the length of an iterative object may exceed N, and an exception of "too many decomposition values" appears.Use "* expression" to resolve the problem:Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb, 22:43:06) [MSC v.1600 32bit (Intel)] on Win32type"Copyright","credits" or "license ()" forMore information.>>> *headdata,current=[10,3,2,6,8,5]#* Modified variables are located in the first position of the list, easy to separate head and tail>>>head
ConceptThe asynchronous function (asynchronous funcation) is a higher level abstraction above the TPL, which really simplifies asynchronous programming. Abstraction hides the main implementation details, allowing programmers to make asynchronous programming easier without having to consider many important things.More contentTo create an asynchronous function, first annotate a method with the Async keywordNote: This article is read in the "C # multithreaded Programming Combat" after the written,
, such as recording 4 images of the alpha, such as the height of the calculation of the terrain, altitude is recorded as 1, elevation must not recorded as 0.struct Input {float2 uv_ SHITOU_TEXTURE;FLOAT2 uv_cao_texture;float2 uv_shazi_texture;float2 uv_niba_texture;float2 uv_BlendTexture;}; void Surf (Input in, InOut surfaceoutput o) {float4 blenddata=tex2d (_blendtexture,in.uv_blendtexture);// Read all the mixed data from the grayscale graph recording the mixing coefficients float4 shitoudata=t
(interruptedexception e) {e.printstacktrace (); } System.out.printf ("Network connection has finished:%s\n", NewDate ()); } }If you run this sample program multiple times, you will find that the main thread will not end until you run the Thread1 and end before running thread2,thread2 ends.The join () method has two similar methods, respectively:(A) Join (long milliseconds)(B) Join (long milliseconds, long Nanos)These two methods lead to the end of the thread that will suspend
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