PYTHON is_numeric

|
Python replacement for PHP's is_numeric [ edit | history ]
```def is_numeric(obj):
if isinstance(obj, numbers.Number):
return True
elif is_string(obj):
nodes = list(ast.walk(ast.parse(obj)))[1:]
if not isinstance(nodes[0], ast.Expr):
return False
if not isinstance(nodes[-1], ast.Num):
return False
nodes = nodes[1:-1]
for i in range(len(nodes)):
if i % 2 == 0:
if not isinstance(nodes[i], ast.UnaryOp):
return False
else:
return False
return True
else:
return False
```

or
```Works for "1e100" or "0xFF" kinda numbers too
```

See is: http://www.php2python.com/wiki/function.is-int/

PHP is_numeric

PHP original manual for is_numeric [ show | php.net ]

is_numeric

(PHP 4, PHP 5)

is_numeric Finds whether a variable is a number or a numeric string

Description

bool is_numeric ( mixed \$var )

Finds whether the given variable is numeric. Numeric strings consist of optional sign, any number of digits, optional decimal part and optional exponential part. Thus +0123.45e6 is a valid numeric value. Hexadecimal notation (0xFF) is allowed too but only without sign, decimal and exponential part.

Parameters

var

The variable being evaluated.

Return Values

Returns TRUE if var is a number or a numeric string, FALSE otherwise.

Examples

Example #1 is_numeric() examples

``` <?php\$tests = Array(        "42",         1337,         "1e4",         "not numeric",         Array(),         9.1        );foreach(\$tests as \$element){    if(is_numeric(\$element))    {        echo "'{\$element}' is numeric", PHP_EOL;    }    else    {        echo "'{\$element}' is NOT numeric", PHP_EOL;    }}?> ```