diff options
Diffstat (limited to 'Lib/pipes.py')
| -rw-r--r-- | Lib/pipes.py | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/Lib/pipes.py b/Lib/pipes.py index 4057fac..3aa1bf1 100644 --- a/Lib/pipes.py +++ b/Lib/pipes.py @@ -110,7 +110,7 @@ class Template: def append(self, cmd, kind): """t.append(cmd, kind) adds a new step at the end.""" - if type(cmd) <> type(''): + if type(cmd) is not type(''): raise TypeError, \ 'Template.append: cmd must be a string' if kind not in stepkinds: @@ -119,7 +119,7 @@ class Template: if kind == SOURCE: raise ValueError, \ 'Template.append: SOURCE can only be prepended' - if self.steps <> [] and self.steps[-1][1] == SINK: + if self.steps and self.steps[-1][1] == SINK: raise ValueError, \ 'Template.append: already ends with SINK' if kind[0] == 'f' and not re.search('\$IN\b', cmd): @@ -132,7 +132,7 @@ class Template: def prepend(self, cmd, kind): """t.prepend(cmd, kind) adds a new step at the front.""" - if type(cmd) <> type(''): + if type(cmd) is not type(''): raise TypeError, \ 'Template.prepend: cmd must be a string' if kind not in stepkinds: @@ -141,7 +141,7 @@ class Template: if kind == SINK: raise ValueError, \ 'Template.prepend: SINK can only be appended' - if self.steps <> [] and self.steps[0][1] == SOURCE: + if self.steps and self.steps[0][1] == SOURCE: raise ValueError, \ 'Template.prepend: already begins with SOURCE' if kind[0] == 'f' and not re.search('\$IN\b', cmd): @@ -165,7 +165,7 @@ class Template: def open_r(self, file): """t.open_r(file) and t.open_w(file) implement t.open(file, 'r') and t.open(file, 'w') respectively.""" - if self.steps == []: + if not self.steps: return open(file, 'r') if self.steps[-1][1] == SINK: raise ValueError, \ @@ -174,7 +174,7 @@ class Template: return os.popen(cmd, 'r') def open_w(self, file): - if self.steps == []: + if not self.steps: return open(file, 'w') if self.steps[0][1] == SOURCE: raise ValueError, \ @@ -203,7 +203,7 @@ def makepipeline(infile, steps, outfile): # # Make sure there is at least one step # - if list == []: + if not list: list.append(['', 'cat', '--', '']) # # Take care of the input and output ends |