From 69ba5d6213c229a21a9b3c412861405bbacb9109 Mon Sep 17 00:00:00 2001
From: guanjihuan <34735497+guanjihuan@users.noreply.github.com>
Date: Fri, 27 Aug 2021 22:54:57 +0800
Subject: [PATCH] version 0.0.19

---
 PyPI/setup.cfg                                        | 2 +-
 PyPI/src/guan/calculate_reciprocal_lattice_vectors.py | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/PyPI/setup.cfg b/PyPI/setup.cfg
index 509dccb..256fc98 100644
--- a/PyPI/setup.cfg
+++ b/PyPI/setup.cfg
@@ -1,7 +1,7 @@
 [metadata]
 # replace with your username:
 name = guan
-version = 0.0.18
+version = 0.0.19
 author = guanjihuan
 author_email = guanjihuan@163.com
 description = An open source python package
diff --git a/PyPI/src/guan/calculate_reciprocal_lattice_vectors.py b/PyPI/src/guan/calculate_reciprocal_lattice_vectors.py
index fb25225..f33c740 100644
--- a/PyPI/src/guan/calculate_reciprocal_lattice_vectors.py
+++ b/PyPI/src/guan/calculate_reciprocal_lattice_vectors.py
@@ -3,7 +3,6 @@
 # calculate reciprocal lattice vectors
 
 import numpy as np
-import sympy
 from math import *
 
 def calculate_one_dimensional_reciprocal_lattice_vector(a1):
@@ -32,10 +31,12 @@ def calculate_three_dimensional_reciprocal_lattice_vectors(a1, a2, a3):
     return b1, b2, b3
 
 def calculate_one_dimensional_reciprocal_lattice_vector_with_sympy(a1):
+    import sympy
     b1 = 2*sympy.pi/a1
     return b1
 
 def calculate_two_dimensional_reciprocal_lattice_vectors_with_sympy(a1, a2):
+    import sympy
     a1 = sympy.Matrix(1, 3, [a1[0], a1[1], 0])
     a2 = sympy.Matrix(1, 3, [a2[0], a2[1], 0])
     a3 = sympy.Matrix(1, 3, [0, 0, 1])
@@ -48,6 +49,7 @@ def calculate_two_dimensional_reciprocal_lattice_vectors_with_sympy(a1, a2):
     return b1, b2
 
 def calculate_three_dimensional_reciprocal_lattice_vectors_with_sympy(a1, a2, a3):
+    import sympy
     cross_a2_a3 = a2.cross(a3)
     cross_a3_a1 = a3.cross(a1)
     cross_a1_a2 = a1.cross(a2)