;>Print_chars.Argtypes=(cTYPES.C_char_p,)>>> print_chars (b " Hello World ' ) 48 6c 6c 6f (6f) 6c 64>>> print_chars (b ' hello\x00 World ' 48 6c 6c 6f>>> print_chars ' Hello World ' ) traceback (most recent call last): File "1, argument 1: >>> If you want to pass a string instead of a byte, you need to perform a manual UTF-8 encoding first. For example:Print_chars(' Hello World '). Encode(' utf-8 '))6c 6c 6f, 6f 6c>>>
For other extension tools (such as Swig, Cython),When you use them
to use the extension code to perform the correct conversion, as follows:Static Pyobject *py_print_chars (Pyobject *self, Pyobject *args) { char *s = 0; int Len; if (! Pyarg_parsetuple (args, "es#", "Encoding-name", s, len)) { return NULL; } Print_chars (S, Len); Pymem_free (s); Py_return_none;}Finally, if you want to work directly with Unicode strings, here is an example that shows the underlying operation access:Static Pyobject *py_print_wchars (Pyobject *self, Pyobject *args) { p
: resourcewarning:unclosed file mode= ' R ' encoding= ' UTF-8 ' >>>> By default, not all warning messages will appear. -w option to control the output of the warning message. -wall All warning messages will be output, -wignore Ignore all warnings, -werror Convert warnings to exceptions. Another option, you can also use warnings.simplefilter () function control output. always parameters will cause all warning messages to appear " Ignore Ignore all warnings, error
method is actually a property, Just the value type of the attribute is a function, we also call it a method:
Category
Properties/Methods
Description
Property
Constructor
Point to the function used to create the current object
Method
hasOwnProperty (PropertyName)
Checks whether the given property is in the current object instance
propertyIsEnumerable (PropertyName)
Checks whether a given property can be enumerated by
50423.6 zsh Script Programming 50823.6.1 Mathematical Operations 50823.6.2 Structured Commands 50923.6.3 function 51023.7 Summary 510Part IV Creating a useful script24th. Writing a simple script utility24.1 Archive 51424.2 Managing user Accounts 523Features required by 24.2.1 52324.2.2 Creating a script 53024.2.3 Running script 53524.3 Monitoring disk space 537Features required by 24.3.1 53724.3.2 Creating a script 54024.3.3 Running script 54124.4 Summary 54225th. Create scripts related to data
Read "Data Mining Technology (third edition)"-Thoughts on marketing, sales and customer relationship management
This book is not a purely data mining theory book, you can probably guess from the subtitle of this book. For a layman like me in the field of data mining, there is not much difficulty in reading this book. This book is not a pure technology book, but its understanding of technical theory is very
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