Pip, <= 2 (cracked by Reto Koradi)

{Name(a,None,None)}{Name(a,None,None)}

This works in the current version of Pip as of this posting (0.15.10.04), and a couple versions prior. Future updates may change this output. I felt a bit bad about posting something so implementation-dependent, but including a <=2 that isn't blindingly obvious was too fun to pass up.

The code is O_.

• _ is the identity function. It's syntactic sugar for the longer form {a}, which is equivalent to lambda a: a in Python.
• In the current version of Pip, I haven't finalized the format of Blocks when converting to Scalars (i.e. strings). Eventually, it's going to look like {a}, but at the moment it wraps the parse tree in curly braces, resulting in the above {Name(a,None,None)} business.
• O is a unary operator that outputs its operand (after casting to Scalar) sans newline.
• Since O is an operator, the whole O_ is an expression that evaluates to the same identity function. If a Pip program ends with an expression, that expression is auto-printed. Thus, {Name(a,None,None)} gets output a second time.

Pip, <= 2 (cracked by Reto Koradi)

{Name(a,None,None)}{Name(a,None,None)}

This works in the current version of Pip as of this posting (0.15.10.04), and a couple versions prior. Future updates may change this output. I felt a bit bad about posting something so implementation-dependent, but including a <=2 that isn't blindingly obvious was too fun to pass up.

The code is O_.

• _ is the identity function. It's syntactic sugar for the longer form {a}, which is equivalent to lambda a: a in Python.
• In the current version of Pip, I haven't finalized the format of Blocks when converting to Scalars (i.e. strings). Eventually, it's going to look like {a}, but at the moment it wraps the parse tree in curly braces, resulting in the above {Name(a,None,None)} business.
• O is a unary operator that outputs its operand (after casting to Scalar) sans newline.
• Since O is an operator, the whole O_ is an expression that evaluates to the same identity function. If a Pip program ends with an expression, that expression is auto-printed. Thus, {Name(a,None,None)} gets output a second time.

Pip, <= 2

{Name(a,None,None)}{Name(a,None,None)}

This works in the current version of Pip as of this posting (0.15.10.04), and a couple versions prior. Future updates may change this output. I feel a bit bad about posting something so implementation-dependent, but including a <=2 that isn't blindingly obvious was too fun to pass up.

Pip, <= 2 (cracked by Reto Koradi)

{Name(a,None,None)}{Name(a,None,None)}

This works in the current version of Pip as of this posting (0.15.10.04), and a couple versions prior. Future updates may change this output. I felt a bit bad about posting something so implementation-dependent, but including a <=2 that isn't blindingly obvious was too fun to pass up.

The code is O_.

• _ is the identity function. It's syntactic sugar for the longer form {a}, which is equivalent to lambda a: a in Python.
• In the current version of Pip, I haven't finalized the format of Blocks when converting to Scalars (i.e. strings). Eventually, it's going to look like {a}, but at the moment it wraps the parse tree in curly braces, resulting in the above {Name(a,None,None)} business.
• O is a unary operator that outputs its operand (after casting to Scalar) sans newline.
• Since O is an operator, the whole O_ is an expression that evaluates to the same identity function. If a Pip program ends with an expression, that expression is auto-printed. Thus, {Name(a,None,None)} gets output a second time.