ESCI 386 Scientific Programming, Analysis and ...
ESCI 386 ? Scientific Programming, Analysis and Visualization with Python
Lesson 2 ? Syntax and Data Types
1
Comments
? Comments in Python are indicated with a pound sign, #.
? Any text following a # and before the next carriage return is ignored by the interpreter.
? For multiple-line comments a # must be used at the beginning of each line.
2
Continuation Line
? The \ character at the end of a line of Python code signifies that the next line is a continuation of the current line.
3
Variable Names and Assignments
? Valid characters for variable, function, module, and object names are any letter or number. The underscore character can also be used.
? Numbers cannot be used as the first character. ? The underscore should not be used as either the
first or last character, unless you know what you are doing. There are some special rules concerning leading and trailing underscore characters.
4
Variable Names and Assignments
? Python is case sensitive! Capitalization matters.
? The variable m and the variable M are not the same.
? Python supports parallel assignment
>>> a, b = 5, 'hi' >>> a 5 >>> b 'hi'
5
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