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Reason: If the computer is using a nforce chipset motherboard and serial hard drive. After all the hardware drivers are installed in the system, it is found that a "Safely Remove Hardware" icon is always displayed in the lower-right corner of the

. Now we can say that we canGreat_circleFaster functions. The so-calledGreat_circleIs to calculate the distance between two points along the Earth's surface: Import mathdef great_circle (lon1, LAT1, lon2, LAT2): radius = 3956 # miles x = math. PI/180.0 A = (90.0-lat1) * (x) B = (90.0-lat2) * (x) Theta = (lon2-lon1) * (x) C = math. ACOs (math. cos (a) * Math. cos (B) + (math. sin (a) * Math. sin (B) * Math. cos (theta) return radius * C Let's call it50Ten thousand times and determine its

data types into Python functions. We can now say that we can make the Great_circle function faster. The so-called great_circle is the question of calculating the distance between two points along the Earth's surface: p1.py Import Math def great_circle (LON1,LAT1,LON2,LAT2): Radius = 3956 #miles x = math.pi/180.0 A = (90.0-LAT1) * (x) b = (90.0-LAT2) * (x) theta = (lon2-lon1) * (x) c = Math.acos ((Math.Cos (a) *math.cos (b)) + (Math.sin (a) *math.sin (b) *math.cos (theta)) Return

. It's too slow! Let's try to rewrite it with Cython quickly and see if there is any difference:C1.pyx Import math Def great_circle (float lon1, float lat1, float lon2, float lat2 ): Cdef float border radius = 3956.0 Cdef float pi = 3.14159265 Cdef float x = pi/180.0 Cdef float a, B, theta, c A = (90.0-lat1) * (x)

variable types: def f (Double x): Return x**2-x def integrate_f (double A, double b, int N): cdef int i cdef double s, dxIt is critical to participate in a variable that is similar to a cyclic calculation such as I,A,S,DX. Even though N and B are less critical, it is recommended that you declare them. Speed up 4 times times. function declaration Type: Using

Gevent core encapsulates libev and uses cython syntax. If you are interested, you can study it carefully. In fact, libev has Python encapsulation. Pyev (https://pythonhosted.org/pyev/), but pyev uses C to write extensions, and the code is very complicated. Read the core. pyx code first. The cython knowledge used by core. pyx. I. Basic cython knowledge 1. differences between cdef, def, and cpdef: cdef is use

language version, Because Python itself is implemented in C and the PYTHON/C API provides a rich interface, this equivalent "translation" implementation is possible.If you have seen Python's source code then you will find that Cython's "translation" results are very well understood, in Pythoni=1This Python statement is calledPyInt_FromLong(1)To generate aPyIntObject。Our "scripted" translation is not much different from the pure Python code being executed in the interpreter, so it may not be a p

be the object of the calling method in the future. Do an experiment: Class Cdef XPuts "Class C, method x:"Puts selfEndEnd c = c.newc.xPuts "that is a called to X by: #{c}"Will output: Class C, Method x:#That is a call to X by: #The output of this thing:# Self in independent methods and class methods When executing an independent method, self represents the object that owns the method. The following experiment creates an object, defines an inde

def Naive_dot (A, b): if a.shape[1]!= b.shape[0]: Raise ValueError (' Shape not matched ') N, p, m = a.shape[0], a.shape[1], b.shape[1] C = Np.zeros ((n, m), Dtype=np.float32) for I In Xrange (n): for J in Xrange (m): s = 0 for k in Xrange (p): s = = A[i, K] * b[k, J] c[i, j] = s Return C Do not have to guess also know that this is compared to C + + written a lot slower. What we are interested in is how t

The code runs in Ipython-notebook and imports the Cython environment in Ipython-notebook. 1 %load_ext Cython Cython can be doped with static types of C and C + + in Python, the Cython compiler can compile Cython source code into C or C + +, and the compiled code can be executed separately or used as a model in Python. The powerful thing about Cython is that Python and C can be combined to make the Cython code that looks like a Python language run at a similar speed to

is the ideal solution, and it does not need to consider a number of factors such as non-maximum rejection and the detection score and the position of the check box when generating the inspection box. Here is the code given by the author: (Of course, more than one line t_t) def cpu_soft_nms (Np.ndarray[float, ndim=2] boxes, float sigma=0.5, float nt=0.3, float threshold=0.001, unsigned int metho d=0): cdef unsigned int N = boxes.shape[0]

Click the new button in the upper right corner to create a new text file or folder, markdown or python file. Here we choose to create a new pyhton file and then go to a new window, example 3: Figure 3 In []: Like ipython, it indicates where we want to enter the code. after entering the code, click the triangle symbol to the right to execute the code. Enter%load_ext cython Run the command. The statement starting with "%" is the magic command of jupyter, "%" is the line command, and "%" is the u

Article Title: Tips for using Cacti configuration. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Tips for using Cacti Configuration: 1. If you use an SNMP template to collect information, the key is to set the OID value of the device information (which can be viewed in Data Templates) and the OID value corresponding to the specific information, google "Comm

. ares_lib_init_all) The Ares library is initialized only on the Windows platform. It is mainly used to load the lplpapi. dll and is not called on non-Windows platforms. If the call is required, it must be called before any function of C-Ares. Cares. ares_library_cleanup () Compared with cares. ares_library_init, The iphlpapi. dll will be released on the Windows platform, which is not called on non-Windows platforms. This function is not called in gevent. The author also uses it in _ dealloc? I

. mint functions improved with minimum Pyrex cdef _mint(challenge, int bits): # Answer a 'generalized hashcash' challenge'" cdef int counter, hex_digits, i cdef char *digest hex_digits = int(ceil(bits/4.)) hash = sha for counter from 0 So far, everything has been very simple. I only declare some variable types that I already know and use the cleanest Pyr

language... So basically we can get the code and use cython for a layer of packaging. Here we can directly paste the Code: #include #include #include #include #include #include #include int serv_listen(const char *name);int send_fd(int sock, int fd, char* data);int recv_fd(int sock, char *data); void close_fd(int fd); The above is the definition of the header file, and then paste th

layer of packaging, you can use, here directly paste code it:#include The above is the definition of the header file, then the C language code to paste it up:#include "sr.h" int sr_connect (const char *name) {int fd, size;struct sockaddr_un un;memset (un, 0, sizeof (un)); Un.sun _family = Af_unix;if ((FD = socket (Af_unix, sock_stream, 0)) Finally, paste the Cython packaging file:cdef extern from "sr.h": extern int sr_connect (const char *name) extern int send_fd (int sock, int fd, char* data)

. Internal Server Error: Server error, check the status of the site, or report a problem. Based on the instructions of the HTTP response code specification, the status code is designed for user error and server error conditions.Always return the full resourceFor responses of 200 and 201, it is always possible to return the complete resource in the response (such as all properties of an object), including Put,patch and delete requests, such as:$ Curl-X DELETE \ https://Service.com/apps/1

. pyx with a friendly feeling. Cares. ares_library_init (cares. ARES_LIB_INIT_ALL) The ares library is initialized only on the windows platform. It is mainly used to load the lplpapi. dll and is not called on non-windows platforms. If the call is required, it must be called before any function of c-ares. Cares. ares_library_cleanup () Compared with cares. ares_library_init, The iphlpapi. dll will be released on the windows platform, which is not called on non-windows platforms. This function is

, unsigned int n): Return Csample.in_mandel (x, Y, N) def divide (x, y): cdef int rem quot = csample.divide (x, y, rem) return quot, remdef avg (double[:] a): Cdef:int sz do uble result sz = a.size with Nogil:result = Csample.avg (Since many of the details are contained in the code above, there are many advanced features described earlier, including array manipulation, wrapping of invisible pointers, and releasing the Gil, so the individual functions