import pandas as pd
df = pd.DataFrame({"a":range(10), "b":range(10,20)})
with open("my_table.tex", "w") as f:
f.write("egin{tabular}{" + " | ".join(["c"] * len(df.columns)) + "}
")
for i, row in df.iterrows():
f.write(" & ".join([str(x) for x in row.values]) + " \
")
f.write("end{tabular}")