Informations

• QISKit (Python SDK) version: 0.5.3
• Python version: 3.6.5
• Operating system: macOS 10.13.5

What is the current behavior?

load_qasm_file and load_qasm_string converts t gate into tdg.

Steps to reproduce the problem

Run the following script.

from qiskit.wrapper import load_qasm_string

qasm_string="""
OPENQASM 2.0;
include "qelib1.inc";
qreg q[1];
creg c[1];
t q[0];
"""
circuit = load_qasm_string(qasm_string, name='tmp', basis_gates='t')
print(circuit.qasm())

The result is as follows.

OPENQASM 2.0;
include "qelib1.inc";
qreg q[1];
creg c[1];
tdg q[0];

What is the expected behavior?

Do not change t gate.

Suggested solutions

I have no idea.