Eval function try to execute and interpret the string (argument) passed to it as python code. x=1 print (eval ('x+1')) Output of the above code will be 2.

174 ast.literal_eval() only considers a small subset of Python's syntax to be valid: The string or node provided may only consist of the following Python literal structures: strings, bytes, …

ast.literal_eval is safer than eval, but it's not actually safe. As recent versions of the docs explain: "Warning It is possible to crash the Python interpreter with a sufficiently large/complex string …

>>> help(ast.literal_eval) Help on function literal_eval in module ast: literal_eval(node_or_string) Safely evaluate an expression node or a string containing a Python expression. The string or …

But they are rare. Using eval in your case is a bad practice for sure. I'm emphasizing on bad practice because eval and exec are frequently used in the wrong place. Replying to the …

Advice: use int, because it's safer, doesn't have security issues (eval can evaluate any expression, including system calls and file deletion), and suits your purpose perfectly. Note: …

You can use ast.literal_eval(node_or_string) which is safe (ish) in Python 2: Safely evaluate an expression node or a string containing a Python expression. The string or node provided may …

With Python backend, your expression is evaluated similar to just passing the expression to Python's eval function. You have the flexibility of doing more inside expressions, such as string …

Python's eval () and globals () Asked 16 years, 8 months ago Modified 9 years, 3 months ago Viewed 23k times

I try to use eval() in a local scope of a function. However it always evaluate in the global scope. Self contained examples: 1- This code works: var1 = 1 var2 = 2 var3 = 3 myDict = dict((name,