python exponent

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same as FG if the exponent is greater than-4 or less than the precision value is the same as E, the other case is the same as FC Single-character (accepts integers or single character strings)R string (convert any Python object using repr)s string (convert any Python object using str)[Python]View PlainCopy >>> pi

Python learning notes sorting (4) strings in Python..., python learning notes A string is an ordered Character Set combination used to store and present text-based information.Common string constants and expressionsT1 = ''empty stringT2 = "diege's" Double quotation marksT3 = "..." "Triple quotation marksT4 = R' \ temp \ diege 'raw string suppression (cancel) Esca

[Python 4] python annoying strings, formatting output, and python annoyingAnnoying string The computer can only process numbers. If you want to process text, you must convert the text into numbers before processing. Since computers were invented by Americans, only 127 letters were first encoded into computers, that is, uppercase and lowercase English letters, num

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-point types Float,python only support double-precision floating-point types, and are native-related.Floating-point types can be represented by decimals, or by scientific notation, which uses uppercase or lowercase e for the 10 exponent, such as E2 for 102.Run the example in the Python shell as follows:>>> 1.01.0>>> 0.00.0>>> 3.36e2336.0>>> 1.56e-20.01563.36e2 of

~2147483647On a 64-bit system, the number of integers is 64 bits and the value range is -2**63~2**63-1, which is -9223372036854775808~9223372036854775807long (Long integer)Unlike the C language, Python's long integers do not refer to the positioning width, that is, Python does not limit the size of long integer values, but in fact, because of limited machine memory, we use a long integer value can not be infinite.Note that, since Python2.2,

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Familiar with Python, using Python to query and update databases, and learning python Review the existing results: (1) connecting to the database; (2) Establishing a pointer; (3) Inserting a record through a pointer; (4) submitting a record to save the inserted result to the database. In the interactive mode, let's get started first and then let us know. Copy cod

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