By Richard Hightower
The content material of this booklet is great. i'm a beginner jython programmer and feature been fidgeting with jython for approximately 3 years. i've got attempted quite a few tutorials or even have bought jython books. This one is the easiest thus far. It covers issues i didn't recognize existed in jython. The presentation of fabric is logical and follows a pleasant gradient of complexity. My simply peeves are that the examples are often misguided and that my e-book didn't include the examples on disk.
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Extra info for Python Programming with the Java(TM) Class Libraries: A Tutorial for Building Web and Enterprise Applications with Jython
In Python, we express the previous sentence as >>> 10 % 7 3 >>> 3 % 2 1 >>> Once you understand modulus, the divmod() function, which we'll discuss in a later chapter, should come easily to you. Table 3-1. 3333 >>> print (x) 47 48 % ** divmod Modulus gives the remainder; typically used for integers Exponential Does both of the division operators at once and returns a tuple; the second item in the tuple contains the remainder. 000030000300003 >>> x = 10 % 3 >>> print (x) 1 >>> x = 10**2 >>> print(x) 100 This: >>> divmod (10,3) (3, 1) Is the same as this: >>> 10/3,10%3 (3, 1) This: >>> divmod (5,2) (2, 1) Is the same as this: abs -, + Finds the absolute value of a number Sign >>> (2, >>> 100 >>> 100 >>> (1, 5/2, 5%2 1) abs(100) abs(-100) 1, -1, +1, +-1 -1, 1, -1) Numeric Conversion Operators Many times we need to convert from one numeric type to another.
Income)d is a useful, flexible feature. You just saw how much time it can save you in writing form letters. Imagine what it can do for writing reports. I l@ve RuBoard I l@ve RuBoard Summary String formatting is the way we organize instructions so that Python can understand how to incorporate data in the creation of strings. How strings are formatted determines the presentation of this data. The basis of string formatting is its use of the formatting directives. Logical operators (and, or, not) return true or false values.
Instead, as in C, its Booleans can be numeric values, where any nonzero value must be true and any zero value must be false. Thus, Python interprets as false the following values: • None • Empty strings • Empty tuples • Empty lists • Empty dictionaries • Zero and as true all other values, including • Nonempty strings • Nonempty tuples • Nonempty lists • Nonempty dictionaries • Not zero Table 3-2 describes the logical operators. They return 1 for a true expression and 0 for a false expression. Table 3-3 describes the comparison operators.
Python Programming with the Java(TM) Class Libraries: A Tutorial for Building Web and Enterprise Applications with Jython by Richard Hightower